With the limit of the use condition and structure of derivate tractor, its front load distribution is more than that of the rear and synchronism adhesion coefficient is small.
变型拖拉机受生产使用条件及结构设计等因素的影响，载荷分配一般是前轴载荷偏大，同步附着系数小，在制动状态下易出现后轮先抱死而发生后轴侧滑，制动性能降低。
Gear pump is the first run, or long-term idle before using, had better under the condition of no load or small load to run one hour or so.
齿轮泵若是第一次运行，或长期闲置后再使用，最好在空载或小负荷情况下先跑合一小时左右。
The APF eliminates the harmonics and compensates the small amounts of load unbalances of power factor that the TBC cannot eliminate due to its binary condition.
APF能消除谐波，补偿少量的负载不平衡或由于TBC二进制条件而不能消除的功率因数。
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