门式起重机应用广泛，其大车运行机构形式多样。
The gantry crane is widely used and its crane travel mechanism exists in a wide variety of forms.
如是垫在主梁下，则除主梁上拱度一项外，其余项目也都可以检查，同时还可以检查大车运行机构的安装质量。
If the cushion in the main beam, in addition to the main beam camber, the rest of the project can also be checked, but also can check the installation quality of the operating mechanism of the cart.
如是垫在主梁下，则除主梁上拱度一项外，其余项目也都可以检查，同时还可以检查大车运行机构的安装质量。
If the cushion in the main beam, in addition to the main beam camber, the rest of the project can also be checked, but also can check the installation quality of the operating mechanism of the cart.
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