liquid expansion steam trap 液体膨胀式蒸汽疏水阀 ; 液体收缩式蒸汽疏水阀 ; 液体膨胀式蒸汽

metal expansion steam trap 金属膨胀式蒸汽疏水阀 ; 金属膨胀式蒸汽

bimetallic expansion steam trap 双金属膨胀式蒸汽疏水阀 ; 双金属膨胀式蒸汽

l expansion steam trap 金属膨胀式蒸汽疏水阀

metis expansion steam trap 金属收缩式蒸汽疏水阀

billic expansion steam trap 双金属膨胀式蒸汽疏水阀

expansion n steam trap 恒温式疏水器