求翻译：铅垂力加载机构5是由蜗轮蜗杆机构和滑动螺旋副[4]组成，从而可使成年操作者通过摇动手柄产生约50kN铅垂加载力，螺套顶端安装三级标准测力环，所标定的力值由测力环直接读取，如图2所示。是什么意思？

Vertical force loading mechanism 5 is a vice by the worm and worm gear and sliding spiral [4] composed of about 50KN vertical loading force generated by shaking the handle so as to enable the adult operator, the top of the threaded sleeve to install three standard dynamometer ring, The force calibra

Lead agencies may turn their competitiveness is loaded by worm wheel and worm with institutions and sliding spiral Deputy [ 4] composition, which can enable adult operator through rocking lever would generate about 50 lead kN vertical load, the snail set their top level 3 standard power installed ce

The normal strength load organization 5 is composed by the worm gear worm bearing adjuster organization and glide screw vice-(4), thus may enable the grown-up operator through to undulate the handle to have the 50kN normal load strength, the nut peak installs three levels of standard proving rings a

Vertical loading bodies 5 is the sliding screw worm gear mechanism and [4] composition, so that the adult operator by turning a crank about 50kN vertical load, proving ring insert installed at the top three levels of standards, the calibration values are read directly by proving ring, as shown in Fi

Book lies the purpose of