品名：起重机抓斗

操作：抓斗张开操作：把起升与开闭同时下降到适当位置，停止起升下降，开闭继续下降，抓斗逐渐张开，完成张开动作。
　　　抓斗闭合操作：开闭卷筒作起升操作，抓斗上部滑轮组不动，下部滑轮组作向上移动，到抓斗抓齿相互交叉相碰，抓斗的闭合动作完成。在闭合过程中，起升卷筒作适当的起升操作，使升降钢丝绳不下垂为限。
　　　抓斗的上升、下降操作：抓斗无论是张开或闭合状态，均可作上升或下降操作。在操作时，升降与开闭卷筒必须同时进行。

应用：广泛用于港口、码头、车站货场、矿山等方面装载各种散货、圆木、矿物、煤炭、砂石料、土石方等。

Item description: grab crane

Operation: open operation: grab the lifting with the opening and closing down to the appropriate location at the same time, to stop lifting down, opening, continue to fall, grab gradually open, complete the open action.

Closed grab operation: open and close drum lifting operation, grab the upper pulley block, the lower pulley block move up, to grab grab teeth into overlapping, grab the closing of the action is complete. In the process of closing, the hoisting drum for proper lifting operation, make the elevator wire rope or not.

Grab the rise and fall of operation: grab either open or closed state, can make up or down operation. In operation, lifting and reel should be carried out at the same time.

Application: widely used in port, dock, station yard, mine loading various aspects such as bulk, logs, minerals, coal, ballast, conditions, etc.