常見(jiàn)例句THE STRUCTURE LENG OF DOUBLE FLANGE JOINT BUTTERFLY VALVE AND DOUBLE FLANGE JOINT BUTTERFLY TYPE CHECKVALVE 雙法蘭連接蝶閥和雙法蘭連接蝶式止回閥結(jié)構(gòu)長(zhǎng)度Valves;fittings;faucet;etc.;Ballvalve;Bibcock;anglevalve;Checkvalve;Gatevalve;Sanitareyware; 三角閥;其他水暖五金;水暖五金;水嘴;水龍頭;choker checkvalve 阻氣單向閥 返回 checkvalve