hollow screw meaning in English

空心螺钉

Hexagonal hollow screw - plugs for use on light alloys
轻合金用六角头空心螺纹塞
Compression couplings - hollow screws for ring - type banjos
压紧联轴节.环形鼓形管用空心螺钉
Overflow valves and hollow screw for fuel injection devices
燃料喷射装置的溢流阀和空心螺钉
Analysis the difficulties in taking - out hollow screws after femoral neck fracture
陈旧性踝关节骨折脱位的手术治疗
Compression couplings with olives ; hollow screw fittings and ring connection fittings for use with union nuts
橄榄形压紧联接器.与管接头配用的空心螺钉管接头和环

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