rotary grab crane

例句：

1. 1. This rotary grab crane is used for lifting heavy loads.
   这台旋转式起重机用于起重重物。
2. 2.The construction site needs a rotary grab crane to move the large equipment.
   施工现场需要一台旋转式起重机来移动大型设备。
3. 3.The rotary grab crane has a powerful motor and can lift up to 50 tons of material.
   这台旋转式起重机拥有强大的电机，可以举起高达50吨的材料。