nickel-plated mild steel round head machine screw
镀镍低碳钢圆头机器螺丝
brass-plated mild steel round head machine scre
镀黄铜圆头软钢机器螺丝
bright mild steel round head wood screw
光亮软钢圆头木螺丝
nickel-plated mild steel round head wood screw
镀镍低碳钢圆头木螺丝
brass-plated mild steel round bead wood screw
镀黄铜圆头软钢木螺丝
slotted oval countersunk head wood screw
一字槽椭圆沉头木螺丝
sunk screw
【机】埋[沉]头螺丝
brass-plated mild steel countersunk head machine screw
镀黄铜平头软钢机器螺丝
nickel-plated mild steel countersunk head machine scre
镀镍低碳钢平头机器螺丝
a threaded hexagonal or square-headed bolt with a nut; tightened with a wrench; used to connect metal parts.
一种带有螺母的六角形或圆头螺纹螺丝；用扳手拉紧；用于连接金属。
a threaded screw for machine parts; screws into a tapped hole.
一种适用于机器部件的螺纹螺丝；可以放进塞孔的螺丝。
brass bolts and nuts with round head
黄铜圆头螺栓和螺母
" Bolts,round head with oval neck"
GB/T8262-1987圆头椭圆颈螺栓
screw-melter-fed spinning machine
螺杆式熔化器喂料纺丝机
The machine is not working well as a screw has come loose
一颗螺丝钉松了，因而机器工作不正常。
The screw on the machine seems loose; you need to tighten it up.
（这机器的螺丝钉松了，你要上紧。
a heavy wood screw with a square or hexagonal head that is driven in with a wrench.
一种带有由扳手销入的正方形或圆形头儿的重材螺丝。
fasteners inspection and measurement instruments
螺丝、螺帽品检量测仪器