ball indentation test的用法和樣例：
例句
- One hardness test shall be performed on each wetted surface cut with oxy-fuel or arc-air which is left unwelded on the finished part.
用含氧燃料或電弧氣切削加工表面上的未焊接的濕表面，應作硬度試驗。 - The manufacturers should take the hardness test of the bomb as a means of quality control, and put it into the quality assurance system.
制造廠(chǎng)應將儲氣瓶硬度試驗作為質(zhì)量控制手段，制定儲氣瓶硬度質(zhì)量控制標準，并將其納入儲氣瓶質(zhì)量保證體系中。
