密缝[mì féng]
词典close joint：密缝。
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close joint
1. air-tight joint：air-tight 不透气的;气密的;密封的 | air-tight joint 密缝 | air-tight seal 密封
2. closejoint：closeinspection 严格检验 | closejoint 密缝 | closejunction 关闭连接