求翻译：经过我研究发现，起升机构以前用的是定量马达，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？

Found through my research, before hoisting mechanism with the quantitative motor, But with the lifting machinery and the increasing demand for the existing mechanical manual quantitative liquid up to the pump less than design requirements for use, so I decided to use after an investigation commercia

After my research found that lifting body is used in the past, but with quantitative motor crane development and requirements of existing machinery, i quantitatively in the manual is designed to pump less than the requirements for use as a result of this investigation, so I decided to use commercial

Studies the discovery after me, lifted the organization before used is the quota motor, but along with the hoisting machinery development and the request enhancement, in myself existing mechanical handbook the quota fluid reached the pump not to the design use request, therefore myself passed throug

After I research found, up rose institutions yiqian with of is 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 comm