Release the pressure forks but keep the knurled screw tightened .

松开压力叉，但仍使滚花螺钉保持拧紧状态。

Cross recessed countersunk head knurled screws .

十字槽沉头滚花螺钉。

The knurled screw moves forward .

滚花螺钉向前移动。

When doing so , turn the knurled screw back and forth until the valve keys snap into place .

执行此操作时，来回转动滚花螺钉，直到气门锁片卡入到位。

Unless expressly specified otherwise , the knurled side of the tools must be facing the press tool .

除非明确地另行指定，否则工具的滚花侧必须朝向压力工具。