1. Lub ntsiab ua rau ntog kev sib tsoo ntawm kev nqa platform
Muaj ntau lub laj thawj rau kev poob ntawm lub tshuab nqa khoom, uas tuaj yeem saib lub ntsiab lus raws li hauv qab no:
(1) Lub nres sab nraud ntawm lub tshuab tsav tsis txaus thiab qhov kev nyab xeeb muaj tsawg heev;
(2) Ib leeg tsav thiab ob npaug (ntau yam) tsav;
(3) Kev ntseeg tsis zoo los tiv thaiv kev poob kev nyab xeeb;
(4) Ua txhaum txoj cai ntawm kev txiav tawm, tsis ua raws li cov khoom ntawm kev qhia cov khoom lag luam, kev ua haujlwm ntau dhau;
(5) Sab nraub qaum ntawm cov tsav pinion thiab rack meshing tsis yog nruab nrog lub log txhawb nqa, lossis daim npoo eccentric ntawm lub log txhawb nqa tsis muaj qhov xauv;
(6) Tsis muaj qhov ntsuas qhov hnyav;
(7) Lwm yam ua rau muaj teeb meem;
