Tes winch yog ib hom khoom siv kho vajtse ruaj ntseg, siv rau txoj kab rov tav traction thiab nqa, tshwj xeeb tshaj yog rau traction ntawm lub nkoj thiab tsheb nyob rau hauv daus, swamp, suab puam, puam, av nkos roob txoj kev thiab lwm yam hnyav ib puag ncig.