【运输】材料，两面均平的，，管子，制造

fluent solid material (bulk material)

TAPPING metal or other material [= screw-threading]

material valve housing (valve box, valve chamber)

abrasive material, loose

homogeneous material【化工】

testing of material machinability by means of cutting tools

grinding with loose abrasive material

moulds of printing surfaces from elastic material