常見(jiàn)例句雙語(yǔ)例句The tangent of the main influencing angle is an important parameter for mining subsidence prediction and surface displacement range demarcation.主要影響角正切是開(kāi)採(cǎi)沉陷預(yù)計(jì)的重要蓡數(shù)，對(duì)於地表影響範(fàn)圍的確定具有重要的意義。www.jsks.net.cn 返回 tangent of an angle