蜗

A new gear grinding way without axial feeding based on the principle of the worm gearing,and how to make up the machine,motions needed in the machine and relationship of the motions are dissertated.

论述了基于这种原理的蜗杆砂轮磨削圆柱齿轮实现无轴向进给磨削的方法及其机床构成和所需要的运动及其相对关系，分析了完成磨削所需要的各种运动及其实现方法。

The tooth contact and kinematic precision of cone-generated double-enveloping worm gearing with machining and assembling errors have been investigated.

对存在加工及装配误差的锥面二次包络环面蜗杆传动进行了接触分析，探讨了各种制造误差对齿面接触质量和运动精度的影响规律和影响程度，提出了矫正由加工误差引起的齿面接触偏倚，减小运动误差的装配调整作业法。

However, a disadvantage of worm gearing is the high sliding velocities across the teeth, the same as with crossed helical gears.

但是，蜗杆传动装置的一个缺陷就是，同交叉轴螺旋齿轮一样，两者在牙口之间都会产生很高的滑动速度。

Fan is constructed of half-open cast aluminum alloyinpeller and aluminum alloy cast worm outer case, smooth surface , non-spakle、cotton-free、non clogged.

1风机采用直叶式半开铝合金压铸叶轮和铝合金压铸蜗壳，表面光洁，具有不产生火花、不粘花、不堵塞等特点

This paper presents a study on hull form of High-speed Landing transport ship according to wave-making resistance theory.

根据兴波阻力理论对高速登陆运输船线型进行了研究，开发了深V压浪首、内蜗尾组合船型。

The RANS governing equation and RNG κ-ε turbulence model were used, and the flow fields at different relative positions between blade and volute tongue in a centrifugal pump were simulated by using finite volume method, under the hypothesis of steady flow.

本文选择RANS方程和RNGk-ε湍流模型，采用有限体积法，在假定流动定常的前提下对离心泵中叶片与蜗舌不同相对位置时的流场进行数值模拟，总结分析了各性能参数的计算误差在不同的相对位置时的变化规律。

French physicist Papin invented a four-blade impeller centrifugal pump volute.

达芬奇所作的草图中。1689年，法国物理学家帕潘发明了四叶片叶轮的蜗壳离心泵。

Valve position indicator is integral to quadrant gear.

阀门的定位指示器与蜗轮连成一体。

The valve is used with worm gear driving and electric device to form a complete set to realize open-close operation. It is the ideal equipment of adjusting flow.

配用电动装置及蜗轮传动装置，可实现启闭操作，是调节流量的理想设备。

The valve is used with worm gear driving device to form a complete set to realize open-close operation. It is the ideal equipment of adjusting flow.

配用蜗轮传动装置，可实现启闭操作，是调节流量的理想设备。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷