A dual variable-diameter wheel pumping unit, which has long stroke and low pumping speed and large load capacity, is designed based on conventional beam pumping units.
双变径轮式抽油机是在继承常规游梁式抽油机优点的基础上设计而成的大载荷、长冲程、低冲次节能型抽油机。
The crank-chain driving and long stroke pumping unit described in this papes is a new type of pumping unit.
曲柄链条动滑轮式长冲程抽油机是一种新型抽油机。
The cylinder chain lower super long stroke pumping unit is a kind of up to date and high efficiency equipment.
圆柱链低矮式超长冲程抽油机是一种新型高效有杆采油设备。
The method of motion analysis of new type and long stroke pumping unit with vertical walking-beam and pylon was studied.
对新型长冲程抽油机——竖游梁塔架式抽油机的运动分析方法进行了研究，导出了该机悬点位移、速度及加速度的计算公式。
The application of single-action sleeve telescopic cylinder can help to solve the contradiction of long stroke and narrow workplace.
应用后法兰单作用套筒伸缩气缸可以解决行程太长而工作场所较窄的矛盾。
Three driving modes of different velocity and resolution (AC mode, GATE mode and DC mode) are used to realize both long stroke length and high resolution.
通过三种不同速度和分辨率的驱动方式(AC模式，GATE模式和DC模式)兼顾大行程与高分辨率的驱动。
This Unit has large load, low stroke frequency, long stroke, high efficiency environmental protection, compact structure, safety, good movement performance.
该机具有大载荷、低冲次、长冲程、高效节能环保和结构紧凑、可靠性高、运动性优的特点。
This pumping unit has many advantages such as small in size, easy to perform long stroke with low stroke times, and convenient to realize automatic control, etc.
该抽油机具有体积小、占地面积少，易于实现长冲程、低冲次、便于实现自动化控制等优点。
The scheme meets the test requirements on long stroke and high precision impact of electric impact platforms, and simultaneously supports and guides moving coils.
本方案解决了在对动圈支撑导向的同时，满足电动冲击台长冲程、高精度冲击的试验要求。
Therefore, the development of a simple structure, good reliability, easy maintenance, and can achieve a long stroke, large displacement, heavy load of new unit, is still a much-needed study.
因此，研制一种结构简单、可靠性好、维护方便且能实现长冲程、大排量、重负载的新型抽油机，仍然是一个急需研究的课题。
The tower type belt driven long stroke pumping unit is composed of the crank-linkage-slide mechanism, movable pulley-narrow belt-fixed pulley mechanism and compound drum stroke-increment mechanism.
无游梁塔架式胶带传动长冲程抽油机由曲柄-连杆-滑块机构、动滑轮-窄胶带-定滑轮机构和复合滚筒增程机构组成。
The framework of the long-stroke pumping unit with compound crown sheave consists of a flat frame with four columns, two cantilever beams and two back legs.
复合天轮式长冲程抽油机主架由四柱扁框架、两个悬臂梁和两个后支腿组成。
Application of two 18-inch speakers, an advanced long-stroke large-diameter voice coil speaker design, with optimized cooling system and high power output.
应用两只18寸喇叭，先进的长冲程大口径音圈扬声器设计，具有优化的散热系统和大功率的输出。
Application of a 18-inch speakers, an advanced long-stroke large-diameter voice coil speaker design, with optimized cooling system and high power output.
应用一只18寸喇叭，先进的长冲程大口径音圈扬声器设计，具有优化的散热系统和大功率的输出。
A new type of energy-saving and long-stroke pumping unit is designed.
文章介绍了一种挂钩换向链条驱动的长冲程节能抽油机的结构和工作原理。
WD-222 is a passive two sub-frequency sound, using a 12-inch long-stroke woofer driver and a 1-inch tweeter drive.
WD-222是一款二分频无源音箱，采用了一只12英寸超长冲程低音单元驱动器和一只1英寸高音单元驱动器。
WD-222 is a passive two sub-frequency sound, using a 12-inch long-stroke woofer driver and a 1-inch tweeter drive.
WD-222是一款二分频无源音箱，采用了一只12英寸超长冲程低音单元驱动器和一只1英寸高音单元驱动器。
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