Home / Standards / GB 2509-81 GB 2509-81 Plain bearings—Copper alloy solid bushes—Types, dimensions and tolerances 滑动轴承铜合金整体轴套型式、尺寸与公差 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A