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当前学科：中级电焊工考试
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碳弧气刨在刨削过程中，碳棒不应（）和（）只能（）刨削时手把要稳，看好准线，碳棒要端正，倾角应保持不变。调整碳棒伸出长度时，不应（），以利碳棒冷却。
A . 横向摆动
B . 前后往复移动
C . 沿刨削方向作直线运动
D . 停止送风
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