Home / Standards / GB 280-64 GB 280-64 Single-row radial ball bearings with felt seals — Structural types and basic dimensions 带毡封圈的单列向心球轴承 结构型式和基本尺寸 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