hold-back device防: provide against; defend agai ...逆行: go in a direction not allowe ...装置: installation; device; appara ...防逆转装置: anti-reverse-rotation device; backstop步行装置: walking unit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:防逆行装置，即可在微信中查询翻译
