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bow-spring compasses | |||
bow compasses; bow instrument; screw compasses; spring bow; spring bow compasses; spring compasses | |||
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hair compasses |
弹簧圆规 : 8 phrases in 4 subjects |
Automobiles | 2 |
Hydroelectric power stations | 1 |
Shipbuilding | 1 |
Technology | 4 |