hard carbon
... hard carbide industry ==> 硬质合金工业 hard carbon ==> 硬碳 hard cash ==> 现金,现款 ...
YCA
carburized case depth ; carburized cottom depth ; carburized cautomotive service engineers depth
KH ; carbonate hardness
硬碳是指难以被石墨化的碳,是高分子聚合物的热分解。