【运输】金属氢化物，催化剂

metal straddling dowel

TAPPING metal or other material [= screw-threading]

technology of light metal【材】

making countersinks, counterbores by means of electrochemical metal working

metal-shearing device hand-held device

flattening test of metal【材】

spark discharge generation of shock waves, metal shaping B 21 D 26/12 运输

Steel metal