trough beam是什么意思 trough beam怎么读
trough beam的用法和样例
- It is provided with a telescopic bracket.The box beam at the external side of the telescopic part of the bracket is inserted into the square hole in the main beam.
其中,拖架具有可伸缩功能,是通过可伸缩部分外侧的箱形梁插入货台主梁的方孔中,选择箱形梁上孔的位置来实现的。
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