產(chǎn)品用途?適用介質(zhì)：水、蒸汽、油品等
產(chǎn)品結(jié)構(gòu)特點(diǎn)?結(jié)構(gòu)特征：B.B;升降止回或B.B,旋啟止回或B.B帶彈簧升降止回主體材料：A105,F5,F11,F22,304,304L,316,316L,LF2等
