hex head set screw六角: hexagonal头: 5点就得动身 have to start before ...止动: locking; fastening螺钉: nut bolt; screw; screw faste ...无头止动螺钉: headle setscrew; headless setscrew下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:六角头止动螺钉，即可在微信中查询翻译
