GB/T 2951.41
in polyethylene using a microscope
ISO 8442-1与食品接触的材料和制品 刀具和凹形餐具 第1部分:准备食物用刀具的要求/Materials and articles in contact with foodstuffs - Cutlery and table holloware - Part 1: Requirements for cutlery for the preparation of food
GB/T 15819灌溉用聚乙烯（PE)管材由插入式管件引起环境应力开裂敏感性的试验方法和技术要求/Polyethylene(PE)pipes for irrigation laterals-Test method and specification of susceptibility to environmental stress cracking induced by insert-type fittings
B
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