H71H/W-16/25Q/H/P對(duì)夾升降式止回閥H71H/W-16/25Q/H/P對(duì)夾升降式止回閥外形尺寸圖結(jié)構(gòu)特點(diǎn)H71H/W-16/25Q/H/P對(duì)夾升降式止回閥具有結(jié)構(gòu)緊湊的特點(diǎn)，由閥體、閥瓣及彈簧組成，采用對(duì)夾連接，由于對(duì)夾升降式止回閥的閥