Home / Standards / GBT 18777-2009 GBT 18777-2009 Geometrical Product Specifications (GPS) — Surface texture: Profile method — Metrological characteristics of phase correct filters 产品几何技术规范 表面结构 轮廓法 相位修正滤波器的计量特性 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A