They worked with hand trowels, a plywood form for lining the shaft with concrete, inch by inch, and a sturdy hand-built crank for lowering a man to the bottom and sending up buckets of sand.
他们的作业工具是：挖土用的手工泥铲、浇筑混凝土井壁用的胶合板模板、还有手工制作摇杆。摇杆将一个人送到井底，那个人就在井底一点点挖土然后再通过摇杆把沙子一桶桶送到地面。
The body is built from balsa wood, and the wings powered by a wire crank driven by a rubber band.
燕尾蝶的身体是用轻木做的，而翅膀的动力来源为用橡皮圈驱动的金属曲柄。
To research wear fault dynamic response for slider-crank of membrane pump, the wear fault dynamic model was built which based on the contact-separation state contact force model.
采用接触—分离二状态接触力模型，建立了隔膜泵曲柄滑块机构磨损故障动力学模型。
According to the dynamic of the engine crank shaft, considering the physical structure of 16V240ZJB diesel engine, it has built the shaft equivalent models.
根据内燃机动力学的分析，结合16V240ZJB柴油机的物理结构，建立了轴系当量模型；
It also features a built-in hand crank that allows for manual operation when power is unavailable.
内置的手摇曲柄允许消磁器在电力无法供应时手动操作。
With a hand crank for back-up power, this storm station also comes with an integrated handle for easy transportation, a built-in LED area light, and a detachable LED flashlight.
随着手回曲柄备用电源，这场风波站还配备了集成处理，运输方便，内置的LED灯区，以及可拆卸的LED手电筒。
With a hand crank for back-up power, this storm station also comes with an integrated handle for easy transportation, a built-in LED area light, and a detachable LED flashlight.
随着手回曲柄备用电源，这场风波站还配备了集成处理，运输方便，内置的LED灯区，以及可拆卸的LED手电筒。
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