patent link链环: chain link; chain iron抓扣链环: grab link活扣: slipknot扣链: bitch chain◇扣链板 [工业] snatch plate活扣儿: a knot that can be easily untied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:活扣链环，即可在微信中查询翻译
