And provides a reliable basis for the design and study of troughed rollers of belt conveyor.

为带式输送机托辊的设计研究提供了可靠的依据。

youdao

And provides a reliable basis for the design and study of troughed rollers of belt conveyor.

为带式输送机托辊的设计研究提供了可靠的依据。

youdao