"Kufuneka" ukulayishwa ngokukhuselekileyo kunye nokulayishwa kweenqwelwana!
Dibana ne-OSHA Ukucaciswa ngeendlela ezahlukeneyo zeTrailer zokuQinisa iiJacks OSHA 1910.178 (k) (3) ithi "Ijacks ezinokulungiswa kunokuba yimfuneko ukuxhasa inqwelo erhuqwayo kunye nokuthintela ukunyuka ngexesha lokulayisha okanye ukothula xa itreyila ingadibananga netrektara" .