()during the last repair?
A. Did you have No.4 cylinder repair
B. Do you have No.4 cylinder repaired
C. Didn’t you have No.4 cylinder repairing
Didn’t you have No.4 cylinder repaired
查看答案
耙矸机固定锲被拉出,主要原因是()。
A. 固定锲未打紧
B. 锲子尺寸不合理
C. 眼过大或未带偏角
D. 固定眼未带向下的偏角