The fixing of davit and primary lifting beam is the key for assembling the hoisting tool of satellite.
吊块及主吊梁的安装是某型号卫星整星吊具安装中的关键环节。
A manhole cover hoisting tool with pulley structure is designed, including base parts, support parts and pulling parts.
设计了一种滑轮式井盖提升工具，包括底座部分、支撑部分和提升部分等。
A manhole cover hoisting tool with pulley structure is designed, including base parts, support parts and pulling parts.
设计了一种滑轮式井盖提升工具，包括底座部分、支撑部分和提升部分等。
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