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 …

youdao

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 …

youdao