The bench test results indicated that the metering quality of the dibbler was increased significantly after improvement.

台架试验结果表明，穴播器经改进后对棉种播种精度有了较。

In this paper, we utilize current equipments such as dynameter and specific fuel consumption detector, and design a set of engine test bench platform based on P89C668.

根据机台架试验测试平台基本要求,充利用了测功机、油耗仪等原有设备,开了基于P89C668机台架试验测试平台,实现了显示、打印、控制和通讯等功能。