Onye edemede: Guanshan Instruments
Onye nrụpụta ihe nrịbama - Nyochaa njupụta gas SF6
Ngwa Guanshan bụ onye nrụpụta ihe nrịbama nrụgide ọkachamara, ọkachamara na igwe anaghị agba nchara, izugbe, capsule, diaphragm, mmiri mmiri - juputara na ihe nrụnye magnetik.