布下面盖着什么 What's under the Cloth
双面盖板 doubling plate
单面盖板对接焊 single strap butt weld
前面盖有印记 Impression devant
书面盖章确认 Sealed in the written confirmation ; Stamped and certified in writing
路面盖满了积雪 Roads covered with snow
端面盖板 Caps for Strut Profile
覆盖面 Coverage ; [数] covering surface
上盖面积 site coverage
并给出结合扬声器设计面盖的实例。
节电器在通电过程中，请勿打开面盖或进行带电作业。
Do not move the cover or live working when this product is drive into conduction.
手机扬声器的面盖不仅起保护扬声器的作用，而且会对电声性能产生影响。
The mobile phone speaker cover can not only protect the speaker, but also have an influence on the electroacoustic characteristics.
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