1 Awọnasọ tieownti ṣayẹwo akọkọ lati rii boya o ni ijẹrisi ibamu. A ti ṣe ayewo igbanu hoisting kọọkan ṣaaju ki o to lọ kuro ni ile -iṣẹ ati pe o ni ijẹrisi ibamu.
2 Ṣe isọ aṣọ aṣọ igbanu gbigbe ati aṣọ wiwọ?
3 Boya awọn dada ti awọnasọ tieownti ge, ni pataki dada pẹlu awọn ẹya irin, gbọdọ ṣayẹwo daradara.
Only when these basic conditions are met can it be considered a qualified asọ tieown and it is safer to use.