A.0.2~1.0mm B.0.25~1.2mm C.0.3~1.0mm
A.立刻全線急停, B.立刻脫開涂頭,并且全線急停 C.立刻脫開涂頭,并提速空跑帶鋼
A.30~45 B.45~60 C.60~75