Ihe ngosi ụlọ ọrụ

Ụlọ ọrụ nyocha nke na-eduga n'ụwa kwadoro onye na-ebubata ngwaahịa a,
Ekwenyere na saịtị site n'aka ụlọ ọrụ nyocha nke ụwa, SGS Group, INTERTEK Group