| 摘要 |
PROBLEM TO BE SOLVED: To enable to automatically control flow rate corresponding to the change of car speed and line stop or nozzle exchange by improving the control accuracy to uniformalize liquid chemical spraying in a boom sprayer. SOLUTION: In a spray working car, in which plural booms 21 each provided with plural nozzle are arranged its the right and left direction of a travelling machine body to form a spray part and the spray work is performed in every booms, a flow rate sensor 4 is provided in the mid way of a pipe line between the spray part and a pump 25 to change the flow rate to adjust to the working width to be sprayed.
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