【化】 DU材料(以塑料为固体润滑剂的滑动减摩材料)

material handling

material valve housing (valve box, valve chamber)

elastic woven material

thawing material (antifreeze material)

homogeneous material【化工】

web-roll core with arrangement for securing the ends of filamentary material

non-silver sensitive material

elongate material of metal coiling