bottom dumping car是什么意思

用法例句

The special structure of the new type of bottom unloading bucket is illustrated, and the principle and the properties of the self locking structure as well as the ways of deciding on and calculating the self locking protection angles are discussed.

阐述了新型底卸式吊桶结构的特点，自锁机构的原理及特性，自锁保护角的选取和计算方法，开启装置的设计。