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来源:雅诚德英语网
Snub lines for the rig tongs must be inspected at regular intervals and be in good working condition.
必须定期检查大钳尾绳,使其处于良好的备用状态。
Snub lines for the rig tongs must be inspected at regular intervals and be in good working condition.
必须定期检查大钳尾绳,使其处于良好的备用状态。