焊接金属波纹管机械密封的应用与存在的问题
Application of welded metal bellow mechanical seal and its existential problems
液态烃泵用焊接金属波纹管机械密封的失效原因及解决办法
Cause and Solution for Invalidation for the Welded Metal Bellow Mechanical Seal for Liquid Hydrocarbon Pump