hi hat
... 筒支顶盖 free top 低支座 hi hat; high hat 端支座 end bearing ...
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研究用低硬度橡胶隔震支座包括天然橡胶隔震支座及铅芯橡胶隔震支座两大类18种规格总计近30个大直径隔震支座。
There are two types of low stiffness rubber bearings, natural rubber bearings and lead plug rubber bearings, total 18 specifications and 30 large diameter specimens are tested.
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