求翻译：经过研究我发现，起升机构以前用定量马达，但是随着起重机械的发展和要求的提高，现在越来越多的起重机液压马达用的是大转矩变量马达，这种马达的优点有许多好处，在论文中有详细的说明，从而不需要减速去这一环节，提高可传动的效率与可靠性。是什么意思？

After the study I found that the hoisting mechanism using fixed displacement motor, but with the lifting machinery and the increasing demand for more and more used crane hydraulic motor is the motor of high torque variable, there are many advantages of this motor benefits are described in detail in

After some research I found that, on the lift, used in the past, but with quantitative motor cranes for the development and improvement, now more and more of the crane hydraulic motor torque is variable motor, this motor benefits there are many advantages in the paper, and are detailed in the decele

After studies me to discover, lifted the organization before with quota motor, but along with the hoisting machinery development and the request enhancement, the more and more many hoist crane oil motor uses now is the big torque variable motor, this kind of motor merit had many advantage, had the d

After research I found, before the lift mechanism with fixed displacement motor, but with the development of lifting appliances and requirements grow, now more and more of the crane is a high torque of hydraulic motor with variable motor, advantages of this motor has a number of benefits, detailed d

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