heat expansion trap 热膨胀式疏水阀

liquid expansion steam trap 液体膨胀式蒸汽疏水阀

metal expansion steam trap 金属膨胀式蒸汽疏水阀

expansion steam trap 恒温式疏水器

expansion drain trap 膨胀排泄阱

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

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