管体：采用合金材料制造，美观大方。
且管体和焊接热影响区对HIC十分敏感。
Its body and welding heat effecting area are very sensitive to HIC.
透明管和泵体的材料一致，硬度相当，具有同样的寿命。
Transparent tube and pump body of material consistent, hardness, have the same life.
以上结构可以方便地把吸尘器管嘴部固定到吸尘器本体上。
Therefore, the nozzle of dust collector can be fixed on the main body.
壁体与埋管间没有气隙热阻。
壁体与埋管间没有气隙热阻。
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