QB/T 3801 -1999.Test method of corrosion on the unplasticized polyvinyI chloride (PVC) pipes for che...
QB轻工标准
QB轻工标准
QB轻工标准
QB/T 3801-1999 化工用硬聚氯乙烯管材的腐蚀度试验方法
QB/T 3801-1999 Test method of corrosion on the unplasticized polyviny| chloride(PVC) pipes for chemi...