square hole cutting slotting tool 方孔插刀
square-hole cage nut 方孔锁紧螺母
square hole pattern 方孔布置
Copper Square hole 铜方单孔
Square Hole Hook 方孔挂钩系列
Chinese ancient copper COINS have a square hole inside a circle.
中国古代铜钱的形状是外圆内方的。
Represented here is one of the last square hole cash issues, marking an end to the over two thousand year tradition of using the square hole cash design.
这枚最后的方孔钱,标示著使用了两千年之久的方孔制钱设计的终结。
The clamping chucks (round hole, square hole and hexagon hole) conform to DIN 6343 standard, changed quickly.
加紧夹头(圆孔、四方孔、六方孔)符合DIN 6343标准,更换方便。
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