A.0.1~0.2mm,1.0mm B.0.2~0.3mm,0.9mm C.0.3~0.5mm,0.8mm D.0.4~0.6mm,0.7mm E.0.7mm以上,0.9mm
A.再生式轉(zhuǎn)型B.轉(zhuǎn)讓式轉(zhuǎn)型C.政府干預(yù)