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back resistance 反向電阻。

back rest

A detailed introduction was made to the properties of the wet coated sand suitable for multi - station shell mould shooting machine ; the development of a sort of high strength coated sand with low resin content : the shaping index and wetness adjusting process : analysis and prevention of peel back defect of shells made with overturning hopper process ; test method of peel back resistance of coated sand : pinhole defect analysis of high ni ductile iron shell mould castings and application of anti - pinhole coated sand 詳細介紹適用于吹砂式多工位殼型機的濕態覆膜砂性能;高強度低樹脂量覆膜砂的研制;濕態殼型覆膜砂的成形性指數與調濕工藝;翻斗法制殼時的脫殼問題分析和解決辦法;覆膜砂脫殼性檢測方法;高鎳球鐵件殼型鑄造表面針孔原因分析與抗針孔覆膜砂的應用。

Burn - back resistance test 抗燒結試驗

Back resistance meter 反向電阻測量計