A.打開機(jī)方爐門時(shí)看到的焦炭 B.打開焦方爐門時(shí)看到的焦炭 C.推焦后遺留在機(jī)焦方的焦炭 D.熄焦后的焦炭。
A.1~4 B.4~7 C.7~10 D.10~13
A.0.001~0.005 B.0.005~0.01 C.0.01~0.015 D.0.05~0.1