Iwu nke Republic of China maka nchekwa ọrụ (November 2002)
Sistemụ Njikwa Ahụike na Nchekwa Ọlụ (December 2001)
Ụkpụrụ Ọrụ nke Nchekwa Ike (January 1987)
Iwu ikike nrụpụta nchekwa (March 2006)
Iwu nchekwa na ịdị ọcha maka ihe ọkụkụ (Mee 1956)
Iwu Mgbochi Ọrịa na Nchịkwa Ọrụ (Mee 2002)
Usoro nlekọta ahụike na njikwa ọrụ (Mee 2002)
Iwu nchekwa ogbunigwe nke mba (November 1992)
Njikwa ike dị ize ndụ (Mkpọchi/Tagout) (American OSHA,29CFR 1910.147)
Europe na Iwu nchekwa na ahụike ọrụ (European OSHA)
Ọkọlọtọ mba maka osisi [NOHSC:1010](Australian)
Oge nzipu: Sep-20-2017
