For digging holes of construction ground work, chasm digging and mud, sand. Coal. gravel loading.

建筑地基的基坑挖掘、深坑挖掘及泥、沙、煤、碎石的装载。

youdao

For digging holes of construction ground work, chasm digging and mud, sand. Coal. gravel loading.

建筑地基的基坑挖掘、深坑挖掘及泥、沙、煤、碎石的装载。

youdao