There are some problems during production of YRT series bearing with special structure.
YRT系列轴承结构特殊，在生产中存在某些问题。
Special pervious concrete 'structure lead to some different performance from common concrete.
正是由于透水砼的这种特殊结构，致使其性能与普通砼有一定的差别。
Special pervious concrete 'structure lead to some different performance from common concrete.
正是由于透水砼的这种特殊结构，致使其性能与普通砼有一定的差别。
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