The axial fixed position preload is applied to middle ring of the shaft, the axial rigidity of the angular contact ball bearing is obtained by the impulse excitation tests.
对转台中环主轴施加轴向定位预紧力，通过脉冲激励法试验得到角接触球轴承的轴向刚度，试验结果与理论结果吻合较好，为转台研制中各轴系预紧量的控制提供了理论和实验依据。
Taking Shanghai Middle Ring Road project as example, the principle and effect of D-125 as a waterproof agent are described.
并以上海中环线工程为例，介绍了D-125有机硅浸渍防水剂的防水原理和防水效果。
The utility model relates to a middle-ring grinder belonging to the grinder applicable to crushing operation of materials.
一种中环磨，属于适用于物料粉碎作业的磨。
The utility model relates to a middle-ring grinder belonging to the grinder applicable to crushing operation of materials.
一种中环磨，属于适用于物料粉碎作业的磨。
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