A. 0.005~0.015 B. 0.015~0.025 C. 0.03~0.05
A. 平面闸门 B. 工作闸 C. 弧形闸门 D. 人字闸门
A. 去毛刺辊支架 B. 导板 C. 张力支架
A. is B. are C. was D. were