滑轮

He hooked pulleys to an external electric motor and cranked things around a bit to check the compression.

他将滑轮钩向外部电动机并用曲柄摇了一下去检查压缩。

"Block and tackle: Combination of pulleys with a rope or cable, commonly used to augment pulling force."

滑轮和滑车组：带绳索和缆绳的滑轮组，通常用于增大拉力。

"Block and tackle: Combination of pulley s with a rope or cable, commonly used to augment pulling force."

滑轮和滑车组：带绳索和缆绳的滑轮组，通常用于增大拉力。

It has to be tall because it is like a giant block and tackle, and we have to lower into the ground and haul out of the ground great lengths of drill pripe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

钻井必须很高，就象一个巨大的滑轮。我们必须降到地下然后将钻杆拔出来。钻杆的顶端有一个马达使它旋转而底部是一个尖头。

Traveling Block - The block and tackle which is rigged with the crown block by multiples of drilling line strung between the crown block and the traveling block.

游动滑车：通过排列穿过天车和游动滑车的多股钻井绳和天车装配在一起的滑轮及装备。

They should utilize a mechanical lifting device (e.g., block and tackle, hoist, or crane) secured to an overhead support, such as a portable tripod, capable of supporting the weight.

他们应该利用机械起重装置（如滑轮和滑车、卷扬机或起重机），起重装置要固定在能够承受容器重量的高架支撑上，如移动三脚架。

Those who had caught sharks had taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting.

而那些捕到鲨鱼的渔夫，也已经把那些鲨鱼送到在小海湾另一边的鲨鱼工厂去了，在那儿鲨鱼被滑轮垂吊起来，然后被取下肝，割掉鳍，剥下皮，肉也被割成条状准备用盐来腌。

Tablets of squares and cubes, calculated from 1 to 60, have been found at Senkera, and a people acquainted with the sun-dial, the clepsydra, the lever and the pulley, must have had no mean knowledge of mechanics.

发现于Senkera的正方形和立方体的写字版，有从1到60的计算。一种懂得日晷仪，水时计，杠杆和滑轮的人群，一定会对机械有很高的认识。

Later models included a double-step pulley for the motor and a proper countershaft assembly, thus doubling the number of available speeds and giving, according to the handbook, a range from 55 to 465 RPM in backgear and from 380 to 3050 in direct drive, which was a much more satisfactory arrangement.

稍后模型包括一个双步滑轮为电动机和一个适当的countershaft大会，因此，人数增加一倍，现有的速度和给予，根据手册，射程从55至465每分钟转速在backgear和从380到3050 ，在直接驱动，这是一个更理想的安排。

Over the years various kinds of both bench and stand-mounted countershafts were available: one model of bench countershaft featured a four-step final-drive pulley with a "fast-and-loose" drive from the motor (which gave the effect of a clutch) whist the other dispensed with this arrangement and was driven directly from the motor by what the makers described as a " special joined V-belt ".

多年来各种都替补和备用安装countershafts有：一种模式的板凳副轴功能的四步最后驱动滑轮的"快速和宽松"的电机驱动器惠其他免除这一安排，并直接驱动电机的制造商所形容为"特别加入V带"。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。