樓主: 小風(fēng)1123
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關(guān)于軸向往復(fù)運(yùn)動(dòng)的密封問題 |
點(diǎn)評(píng)
焊接要非常過關(guān),,泵要常抽,波紋管不建議用于高直空,,理由是焊的地方多,,即使不是焊的也因?yàn)樘∪菀淄笟?nbsp;
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