GCr4限制淬透性轴承钢
Restricted Hardenability GCr4 Bearing Steel
半渗透性
differential permeability
differential permiability
semipermeability
Semi-permeable Membrane
半透性膜
semipermeable membrane
Semi-permeable Membrane
differentially permeable membrane
semipolar linkage
semipolar bond
包膜层通透性
Penetrability of coating layer
包膜通透性
Penetrability of coating layer