n. bottom
misc. bottom cap ; lower cap ; lower head
... 一端为六角形的平边粘合一热封合阀口袋valved pasted heat sealed flat sack with one hexag- 4.1.1底盖bottom cap 4.2. 1阀套valve sleeve ...
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避免底盖变形影响手表密封性。
Prevent the deformation of the bottom cover to affect the sealing performance of the watch.
步骤二：开启手表底盖。
瓶体底部设底盖，该底盖包括可通过螺纹旋合在一起的内底盖和外底盖。
A bottom cover is arranged at the bottom of the bottle body; the bottom cover comprises an inner bottom cover and an outer bottom cover which are screwed together by thread.
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