A "ayenera" potsegula mosamala ndi kutsitsa ma trailer!
Kumanani ndi OSHA Kufotokozeredwa kwathu ndi ma Trailer osiyanasiyana Olimbitsa Jacks OSHA 1910.178 (k) (3) akuti "Ma jacks okhazikika atha kukhala ofunikira kuthandizira theka-trailer ndikutchingira kukweza mukamatsitsa kapena kutsitsa pomwe ngoloyo sinalumikizane ndi thirakitara" .