标 准 编 号: MSS SP-6-2007简体中文标题:管法兰以及阀门和管件端法兰的接触面标准精度繁体中文标题:管法兰以及阀门和管件端法兰的接触面标准精度English Name:Standard finishes for contact faces of pipe flanges and connecting-end flanges of valves and fittings...