straight handpiece for slip-joint connection滑: slippery; smooth节: joint; knob; node连接体: connector用: 40分钟跑完全程 run the course in 4 ...直: straight; stiff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:滑节连接体用直形机头，即可在微信中查询翻译
