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管帽包括凸形管帽、锥壳、变径段、平盖及紧缩口的设计。
Tube caps include convex hull, hats, cone tube diameter changes, flat cover and tightening of design.
youdao
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管帽包括凸形管帽、锥壳、变径段、平盖及紧缩口的设计。
Tube caps include convex hull, hats, cone tube diameter changes, flat cover and tightening of design.
youdao