screw-cap的用法和样例：
词汇搭配
- socket head cap screw 内六角螺钉
- fuse plug with screw cap 螺丝头熔线塞...
- button head cap screw 圆头帽螺钉
- valve body cap screw 阀体盖螺钉
- cap of screw 螺钉帽
- socket cap screw 圆柱头内六角螺钉...
- main valve head cap screw 主阀盖有头螺钉...
- screw cap 螺旋帽(螺丝钉头)...
- turbine cover screw cap 涡轮盖螺旋帽...
- cap screw 帽螺钉
- blast cap screw 鼓风盖螺钉
