A.阻力大于浮力,末端相對(duì)壓力大于始端相對(duì)壓力B.阻力大于浮力,末端相對(duì)壓力小于始端相對(duì)壓力C.阻力小于浮力,末端相對(duì)壓力大于始端相對(duì)壓力D.阻力小于浮力,末端相對(duì)壓力小于始端相對(duì)壓力
A.焦餅過生過火B.爐墻或爐底磚變形C.裝煤結(jié)焦性好
A.20mmB.10~20mmC.12~16mm