常見例句雙語例句There must be good support for the mast, jib boom attachment, and other fittings.必須有良好的支持桅桿，臂景氣實(shí)習(xí)，及其他配件。The conventional method to determine the loading position on the hydraulic cylinder of main and auxiliary boom of weight-lifting attachment on excavator is qualitative analysis.挖掘機(jī)工作裝置上的主、副臂液壓缸最大受力位置，以往是通過定性分析確定。 返回 boom attachment