... 透气性的测定 Determination of permeability to gases 优秀的透气性 Excellent ventilation 砂的透气性 sand permeability ...
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针对干砂消失模铸造用涂料具有高透气性、高强度的特点，研制了一种涂料透气性、强度专用测量装置。
According to the characteristics, which coatings used in EPC are of high permeability and strength, a special device used to measure the strength and permeability is worked out.
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