- 1. Ukuqina kwamakhemikhali:
Inokubekezelelana okuhle kumakhemikhali afana nama-acid kanye ne-alkalis futhi awonakaliswa kalula. Igcina ukusebenza okuhle futhi ngeke ilinyazwe yi-acid kanye ne-alkali yokugqwala.
- 2. Indawo ebushelelezi:Ingaphezulu elibushelelezi livumela umusi ukuthi asatshalaliswe ngokulinganayo ezitshalweni zokupheka, ezisiza ukuthuthukisa ukupheka ukusebenza kahle, ziqinisekisa ukuthi ukudla kufudumele ngokulinganayo, futhi kunambitha kangcono.
- 3. Kusetshenziswe kabanzi:Inezindlela ezahlukahlukene zohlelo lokusebenza embonini yokupheka ye-Steam futhi isetshenziswa kabanzi emishini yanamuhla ekhishini efana nama-steamers elayisi kanye nabathumbi.
- 4. Imvelo nemvelo futhi inempilo:Okungeyena ubuthi futhi akunambitha, kuhlangabezana nalokho okuphishekela abantu banamuhla ngokuvikelwa kwemvelo nokuphila okunempilo. Akudedeli izinto eziyingozi, ukuqinisekisa inhlanzeko nokuphepha kokudla okuphekiwe.