DB Double bottom 双层底
To associate the connection with the project In the DB Servers perspective, double-click on the Con1 connection to expand it.
要使该连接与DB Servers perspective中的选项相关联,请双击Con 1连接展开它。
DB combinations, DF combinations and four-point contact, double row angular contact ball bearings can withstand radial and bi-axial load.
DB组合,DF组合及四点接触、双列角接触球轴承可承受径向和双向轴向负荷。
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