求翻译：经过研究发现，起升机构以前的定量马达，但是随着起重机械的发展和要求的提高，本人现有机械手册中定量液达泵不到设计使用的要求，因此本人经过调查决定使用商用QJM低速定量马达，这种马达有极变量，调速范围大、体积小，可靠性高等优点，在论文中有详细的说明，而且省去减速器去这一环节，提高可传动的效率与可靠性。是什么意思？

Has found that, before the lifting mechanism from the quantitative motor, but with the development and the increasing demand of lifting appliances, existing mechanical manual quantitative solution of the pump is less than design requirements for use, so I decided to use commercial qjm low speed afte

After a study found that in previous quantitative motor, but with the lifting of the development and advancement requirements, mechanical manuals in my existing quantitative fluid up to pump less than design the requirements for use as a result of the investigation, so I decided to use commercial QJ

After the research discovery, lifts the organization beforehand quota motor, but along with the hoisting machinery development and the request enhancement, in myself existing mechanical handbook the quota fluid reaches the pump not to the design use request, therefore myself pass through the investi

After research found, up rose institutions yiqian of quantitative motor, but as lifting machinery of development and requirements of improve, I existing machinery manual in the quantitative liquid up pump does not to design using of requirements, so I after investigation decided using commercial QJM