断层附近的反牵引现象是正确判断断层性质、准确寻找断失盘煤层的一项非常重要的干扰因素。
The phenomena of reverse folds nearby fault is a very important interfection factor by which to Judge faulted character and search for lost ledge coal bed.
为了从理论上解释副谐波负载牵引实验中的各种非线性现象，对一个A类MESFET功放进行了研究。
In order to analyze the nonlinear characteristic presented in the subharmonic load pull experiment theoretically, a class a MESFET power amplifier is researched on in this paper.
轮式拖拉机特别是小型轮式拖拉机在田地进行重负荷作业时，牵引附着性能差，驱动轮滑转严重，造成牵引效率低、油耗大是普遍现象。
Wheel tractors, especially small wheel tractors have some well-known disadvantages such as poor traction performance, driving wheel slipping, low traction efficiency and high fuel consumption.
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