translate([0,0,0]) {
    union() {
        translate([0,0,0]) {
            linear_extrude(height=20)
                polygon([
                    [12, 20],
                    [11, 19],
                    [11, 18],
                    [22, 2],
                    [22, 1],
                    [21, 0],
                    [2,  0],
                    [44, 0],
                    [42.3, 0.3],
                    [42, 2],
                    [53.7, 18.3],
                    [54, 19.7],
                    [53, 20],
                ]);
                
            difference() {
                polyhedron(
                    points = [
                        [0,0,0],   // 索引 0: V0
                        [0,0,20],  // 索引 1: V1
                        [64,0,20], // 索引 2: V2
                        [64,0, 0],  // 索引 3: V3
                        [64,-60,0],// 索引 4: V4
                        [0, -60,0]  // 索引 5: V5
                    ],
                    faces = [
                        // 修正后的 faces 列表：
                        [0, 5, 4, 3], // Bottom (Z=0) - 确认顺序，从外部看顺时针
                        [1, 0, 3, 2], // Face at Y=0 (Vertical Front) - 确认顺序，从外部看顺时针
                        [1, 2, 4, 5], // Top (Sloped) - 确认顺序，从外部看顺时针
                        [1, 5, 0],   // Left Side (X=0, Triangle) - 确认顺序，从外部看顺时针
                        [2, 3, 4]    // Right Side (X=64, Triangle) - 确认顺序，从外部看顺时针
                    ]
                );
                translate([0, -60, 0])
                    difference() {
                        cube(4);
                        translate([4,4,0])
                            cylinder(h=4, r=4);
                    }

                translate([60, -60, 0])
                    difference() {
                        cube(4);
                        translate([0,4,0])
                            cylinder(h=4, r=4);
                    }
            }
        }
        translate([64, 0, 0]) {
            difference() {
                polyhedron(
                    points = [
                        [0,0,0],   // 索引 0: V0
                        [0,0,20],  // 索引 1: V1
                        [64,0,20], // 索引 2: V2
                        [64,0, 0],  // 索引 3: V3
                        [64,-60,0],// 索引 4: V4
                        [0, -60,0]  // 索引 5: V5
                    ],
                    faces = [
                        // 修正后的 faces 列表：
                        [0, 5, 4, 3], // Bottom (Z=0) - 确认顺序，从外部看顺时针
                        [1, 0, 3, 2], // Face at Y=0 (Vertical Front) - 确认顺序，从外部看顺时针
                        [1, 2, 4, 5], // Top (Sloped) - 确认顺序，从外部看顺时针
                        [1, 5, 0],   // Left Side (X=0, Triangle) - 确认顺序，从外部看顺时针
                        [2, 3, 4]    // Right Side (X=64, Triangle) - 确认顺序，从外部看顺时针
                    ]
                );
                translate([0, -60, 0])
                    difference() {
                        cube(4);
                        translate([4,4,0])
                            cylinder(h=4, r=4);
                    }

                translate([60, -60, 0])
                    difference() {
                        cube(4);
                        translate([0,4,0])
                            cylinder(h=4, r=4);
                    }
            }
        }
        translate([128, 0, 0]) {
            linear_extrude(height=20)
                polygon([
                    [12, 20],
                    [11, 19],
                    [11, 18],
                    [22, 2],
                    [22, 1],
                    [21, 0],
                    [2,  0],
                    [44, 0],
                    [42.3, 0.3],
                    [42, 2],
                    [53.7, 18.3],
                    [54, 19.7],
                    [53, 20],
                ]);
            difference() {
                polyhedron(
                    points = [
                        [0,0,0],   // 索引 0: V0
                        [0,0,20],  // 索引 1: V1
                        [64,0,20], // 索引 2: V2
                        [64,0, 0],  // 索引 3: V3
                        [64,-60,0],// 索引 4: V4
                        [0, -60,0]  // 索引 5: V5
                    ],
                    faces = [
                        // 修正后的 faces 列表：
                        [0, 5, 4, 3], // Bottom (Z=0) - 确认顺序，从外部看顺时针
                        [1, 0, 3, 2], // Face at Y=0 (Vertical Front) - 确认顺序，从外部看顺时针
                        [1, 2, 4, 5], // Top (Sloped) - 确认顺序，从外部看顺时针
                        [1, 5, 0],   // Left Side (X=0, Triangle) - 确认顺序，从外部看顺时针
                        [2, 3, 4]    // Right Side (X=64, Triangle) - 确认顺序，从外部看顺时针
                    ]
                );
                translate([0, -60, 0])
                    difference() {
                        cube(4);
                        translate([4,4,0])
                            cylinder(h=4, r=4);
                    }

                translate([60, -60, 0])
                    difference() {
                        cube(4);
                        translate([0,4,0])
                            cylinder(h=4, r=4);
                    }
            }
        }
    }
}
translate([200,0,0]) {
    union() {
        translate([0,0,0]) {
            linear_extrude(height=20)
                polygon([
                    [12, 20],
                    [11, 19],
                    [11, 18],
                    [22, 2],
                    [22, 1],
                    [21, 0],
                    [2,  0],
                    [44, 0],
                    [42.3, 0.3],
                    [42, 2],
                    [53.7, 18.3],
                    [54, 19.7],
                    [53, 20],
                ]);
                
            difference() {
                polyhedron(
                    points = [
                        [0,0,0],   // 索引 0: V0
                        [0,0,20],  // 索引 1: V1
                        [64,0,20], // 索引 2: V2
                        [64,0, 0],  // 索引 3: V3
                        [64,-60,0],// 索引 4: V4
                        [0, -60,0]  // 索引 5: V5
                    ],
                    faces = [
                        // 修正后的 faces 列表：
                        [0, 5, 4, 3], // Bottom (Z=0) - 确认顺序，从外部看顺时针
                        [1, 0, 3, 2], // Face at Y=0 (Vertical Front) - 确认顺序，从外部看顺时针
                        [1, 2, 4, 5], // Top (Sloped) - 确认顺序，从外部看顺时针
                        [1, 5, 0],   // Left Side (X=0, Triangle) - 确认顺序，从外部看顺时针
                        [2, 3, 4]    // Right Side (X=64, Triangle) - 确认顺序，从外部看顺时针
                    ]
                );
                translate([0, -60, 0])
                    difference() {
                        cube(4);
                        translate([4,4,0])
                            cylinder(h=4, r=4);
                    }

                translate([60, -60, 0])
                    difference() {
                        cube(4);
                        translate([0,4,0])
                            cylinder(h=4, r=4);
                    }
            }
        }
        translate([64, 0, 0]) {
            difference() {
                polyhedron(
                    points = [
                        [0,0,0],   // 索引 0: V0
                        [0,0,20],  // 索引 1: V1
                        [64,0,20], // 索引 2: V2
                        [64,0, 0],  // 索引 3: V3
                        [64,-60,0],// 索引 4: V4
                        [0, -60,0]  // 索引 5: V5
                    ],
                    faces = [
                        // 修正后的 faces 列表：
                        [0, 5, 4, 3], // Bottom (Z=0) - 确认顺序，从外部看顺时针
                        [1, 0, 3, 2], // Face at Y=0 (Vertical Front) - 确认顺序，从外部看顺时针
                        [1, 2, 4, 5], // Top (Sloped) - 确认顺序，从外部看顺时针
                        [1, 5, 0],   // Left Side (X=0, Triangle) - 确认顺序，从外部看顺时针
                        [2, 3, 4]    // Right Side (X=64, Triangle) - 确认顺序，从外部看顺时针
                    ]
                );
                translate([0, -60, 0])
                    difference() {
                        cube(4);
                        translate([4,4,0])
                            cylinder(h=4, r=4);
                    }

                translate([60, -60, 0])
                    difference() {
                        cube(4);
                        translate([0,4,0])
                            cylinder(h=4, r=4);
                    }
            }
        }
        translate([128, 0, 0]) {
            linear_extrude(height=20)
                polygon([
                    [12, 20],
                    [11, 19],
                    [11, 18],
                    [22, 2],
                    [22, 1],
                    [21, 0],
                    [2,  0],
                    [44, 0],
                    [42.3, 0.3],
                    [42, 2],
                    [53.7, 18.3],
                    [54, 19.7],
                    [53, 20],
                ]);
            difference() {
                polyhedron(
                    points = [
                        [0,0,0],   // 索引 0: V0
                        [0,0,20],  // 索引 1: V1
                        [64,0,20], // 索引 2: V2
                        [64,0, 0],  // 索引 3: V3
                        [64,-60,0],// 索引 4: V4
                        [0, -60,0]  // 索引 5: V5
                    ],
                    faces = [
                        // 修正后的 faces 列表：
                        [0, 5, 4, 3], // Bottom (Z=0) - 确认顺序，从外部看顺时针
                        [1, 0, 3, 2], // Face at Y=0 (Vertical Front) - 确认顺序，从外部看顺时针
                        [1, 2, 4, 5], // Top (Sloped) - 确认顺序，从外部看顺时针
                        [1, 5, 0],   // Left Side (X=0, Triangle) - 确认顺序，从外部看顺时针
                        [2, 3, 4]    // Right Side (X=64, Triangle) - 确认顺序，从外部看顺时针
                    ]
                );
                translate([0, -60, 0])
                    difference() {
                        cube(4);
                        translate([4,4,0])
                            cylinder(h=4, r=4);
                    }

                translate([60, -60, 0])
                    difference() {
                        cube(4);
                        translate([0,4,0])
                            cylinder(h=4, r=4);
                    }
            }
        }
    }
}
translate([400,0,0]) {
    union() {
        translate([0,0,0]) {
            linear_extrude(height=20)
                polygon([
                    [12, 20],
                    [11, 19],
                    [11, 18],
                    [22, 2],
                    [22, 1],
                    [21, 0],
                    [2,  0],
                    [44, 0],
                    [42.3, 0.3],
                    [42, 2],
                    [53.7, 18.3],
                    [54, 19.7],
                    [53, 20],
                ]);
                
            difference() {
                polyhedron(
                    points = [
                        [0,0,0],   // 索引 0: V0
                        [0,0,20],  // 索引 1: V1
                        [64,0,20], // 索引 2: V2
                        [64,0, 0],  // 索引 3: V3
                        [64,-60,0],// 索引 4: V4
                        [0, -60,0]  // 索引 5: V5
                    ],
                    faces = [
                        // 修正后的 faces 列表：
                        [0, 5, 4, 3], // Bottom (Z=0) - 确认顺序，从外部看顺时针
                        [1, 0, 3, 2], // Face at Y=0 (Vertical Front) - 确认顺序，从外部看顺时针
                        [1, 2, 4, 5], // Top (Sloped) - 确认顺序，从外部看顺时针
                        [1, 5, 0],   // Left Side (X=0, Triangle) - 确认顺序，从外部看顺时针
                        [2, 3, 4]    // Right Side (X=64, Triangle) - 确认顺序，从外部看顺时针
                    ]
                );
                translate([0, -60, 0])
                    difference() {
                        cube(4);
                        translate([4,4,0])
                            cylinder(h=4, r=4);
                    }

                translate([60, -60, 0])
                    difference() {
                        cube(4);
                        translate([0,4,0])
                            cylinder(h=4, r=4);
                    }
            }
        }
        translate([64, 0, 0]) {
            linear_extrude(height=20)
                polygon([
                    [12, 20],
                    [11, 19],
                    [11, 18],
                    [22, 2],
                    [22, 1],
                    [21, 0],
                    [2,  0],
                    [44, 0],
                    [42.3, 0.3],
                    [42, 2],
                    [53.7, 18.3],
                    [54, 19.7],
                    [53, 20],
                ]);
            difference() {
                polyhedron(
                    points = [
                        [0,0,0],   // 索引 0: V0
                        [0,0,20],  // 索引 1: V1
                        [64,0,20], // 索引 2: V2
                        [64,0, 0],  // 索引 3: V3
                        [64,-60,0],// 索引 4: V4
                        [0, -60,0]  // 索引 5: V5
                    ],
                    faces = [
                        // 修正后的 faces 列表：
                        [0, 5, 4, 3], // Bottom (Z=0) - 确认顺序，从外部看顺时针
                        [1, 0, 3, 2], // Face at Y=0 (Vertical Front) - 确认顺序，从外部看顺时针
                        [1, 2, 4, 5], // Top (Sloped) - 确认顺序，从外部看顺时针
                        [1, 5, 0],   // Left Side (X=0, Triangle) - 确认顺序，从外部看顺时针
                        [2, 3, 4]    // Right Side (X=64, Triangle) - 确认顺序，从外部看顺时针
                    ]
                );
                translate([0, -60, 0])
                    difference() {
                        cube(4);
                        translate([4,4,0])
                            cylinder(h=4, r=4);
                    }

                translate([60, -60, 0])
                    difference() {
                        cube(4);
                        translate([0,4,0])
                            cylinder(h=4, r=4);
                    }
            }
        }
    }
}