Elevations of adjacent walls shall be maintained during laying chamber wall and they shall be checked and readjusted layer by layer during laying upper walls to keep chamber top in one level.是什么意思_Elevations of adjacent walls shall be maintained during laying chamber wall and they shall be checked and readjusted layer by layer during laying upper walls to keep chamber top in one level.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句