The invention is an efficient positive vortex pump, which belongs to fluid machinery.
本发明是一种高效的正旋涡泵，属于流体机械。
The concrete pump truck is a main equipment of construction machinery during commercial concrete …
混凝土泵车是商品混凝土运输、浇筑施工的主要设备之一。
The concrete pump truck is a main equipment of construction machinery during commercial concrete …
混凝土泵车是商品混凝土运输、浇筑施工的主要设备之一。
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