round head machine screw

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