• 1. forward drive line: 向前驱动管路
• 2. forward drive supply line: 向前驱动供油管路
• 3. forward drive return line: 向前驱动回油管路

• 1.This paper has set up a computer aided diagnostic expert system for automotive drive line by way of forward and backward combined reasoning and depth optimal theory.
  本文采用正反向混合推理机制，深度优先的控制策略建立了一个基于知识的汽车传动系故障计算机辅助系统。
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• 2.The driller engages the drawworks in forward drive and sets the throttle at minimum speed. And engages the low clutch and slowly spools the drilling line on the drawworks drum.
  司钻启动绞车正转，把油门调到最低限度，挂上低速离合器，慢慢的把大绳缠到绞车辊筒上。
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