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                     Before installation should be tested based on quality, required no effect on the strength of concrete defects, the number and location of the hole reserved to meet the requirements, A ground method while the installation, based on the surface to be embedded in the central standard board. Base Ball installed on a solid concrete foundation. Base Ball basic design and construction please refer to assembly drawings and foundation drawings ball. In order to ensure the process of using the various components of the position precision ball does not change much, ball should be based on block structure used. The basis of compressive strength of concrete, after more than 75% can be installed in the above ball.


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