blow-off valve seatdischarge valve seat放水: turn on the water阀座: valve base吸水及放水阀座: suction and discharge valve seat水阀座: water valve seat放水阀: discharge water valve; purge valve; water drain 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:放水阀座，即可在微信中查询翻译
