Unverified75% confidenceDecision RuleTime unknown
耐用度关键在活塞密封圈材质和缸体材质：全塑料缸体在反复抽气后易磨损漏气，选带金属杆或加厚缸壁的型号，密封圈选硅胶而非普通橡胶
1
Sources
75%
Confidence
Long-term
Relevance
-
First Seen
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