阀门标准 GBT 19230.5-2003 评价汽油清净剂使用效果的试验方法 第5部分 汽油清净剂对汽油机进气阀和燃烧室沉积物生成倾向影响的发动机台架试验方法(Ford 2.3L方法).pdf [db:摘要]
阀门标准 BS 7461-1991 Specification for electrically operated automatic gas shut-off valves fitted with throughput adjusters, proof of closure switches.pdf [db:摘要]
