2. It is strictly forbidden to use cast iron or cast steel ẹwọns. The buckle body can be forged with killed steel, and the shaft pin can be machined after forging from bar material.
3. Awọnẹwọn ko yẹ ki o gbẹ iho tabi welded lati tunṣe. Lẹhin ti ara idii ati PIN ọpa ti wa ni idibajẹ lailai, ko si awọn atunṣe ti a gba laaye.
4. Nigbati o ba wa ni lilo, ṣayẹwo ara idimu ati ẹdun, ki o yago fun yiya to ṣe pataki, idibajẹ ati awọn dojuijako rirẹ.
5. Nigbati o ba wa ni lilo, aye petele ko yẹ ki o wa labẹ aifokanbale, ati pin ọpa gbọdọ fi sii pẹlu PIN aabo.
6. Lẹhin ti a ti ṣajọpọ ọpa ọpa ni deede, iwọn ti ara mura silẹ ko gbọdọ dinku ni pataki, ati asopọ ti o tẹle jẹ dara.
7. Lilo tiẹwọnskii yoo kọja fifuye ailewu pato.
