underground testing laboratory
常見(jiàn)例句
- By bolt's testing in mechanical properties in laboratory and anchoring force in underground, the conclusion are as follows: its bodys owned high intension and may be recovered and reused.
并通過(guò)實(shí)驗(yàn)室力學(xué)性能、井下錨固力測(cè)試得出：新型錨桿的桿體強(qiáng)度高，可回收并可多次復(fù)用； 返回 underground testing laboratory