straight-cut operation

In order to increase the efficiency and precision of eveling operation of track dozer, a track dozer model with blade moving straight forward was presented. A crawler dozer model with terrain sensing device was further designed on its basis, and a longitudinal leveling principle was suggested.

为提高履带式推土机平地作业的效率和精度，本文在提出表示铲刀纵前向运动的履带式推土机模型的基础上，进一步设计出带地形探测器的履带式推土机模型，并据此提出纵向找平原理。

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During operation, the microcontroller reads the three continuously tracing status of the infrared sensor signals to control the two motors with high and low speed, in order to achieve such as turning and driving straight state.

运行过程中，单片机不断读取3个寻迹红外线传感器的状态信号，控制两个电机以高、低两级不同的速度运转，以实现转弯和直线行驶等状态。

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A kind of horizontal straight-neck, double-bottle mouth portable water samplers was designed. It was simple in structure and operation, and was easy to clean and to continuously connect sampling staff.

设计了一种具有结构简便、操作方便、易于清洗和采样杆可续接的直颈双口卧式便携水样采集器。

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Afterwards I wondered the less at this operation when I came to know of what fine steel the head of a harpoon is made, and how exceedingly sharp the long straight edges are always kept.

不过，后来我对他这一操作也比较不那么惊奇了，因为我得知那标枪头是用纯钢炼成的，而且那又直又长的刀锋经常磨得十分犀利。

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Adopting the straight-line bearing and asynchronism electrical machineries of conical surface braking, operation is steady.

采用直线轴承及锥面制动三相异步电机, 运作平稳.

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