double ring valve双: two; twin; both; dual环: ring; hoop阀: established house or power g ...双环: bicycle; bicyclic ring; dicyclo; dual homing; twin circle多环阀: multiple ring valve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:双环阀,即可在微信中查询翻译