Bedeutungen
[die] 缸盖螺栓；带帽螺钉，钉头螺丝
❬hr color=#336cc size=1 /❭
[die] 钉头螺丝。没有螺母的螺丝。机器螺钉。带帽螺钉。缸盖螺栓。
head screw, cap screw, machine screw