Hikelok nwere ọtụtụ ngwaahịa dị iche iche, gụnyere valvụ ngwá ọrụ na ihe ndozi, ngwaahịa nrụgide dị elu, ngwaahịa ịdị ọcha dị oke elu, valves nhazi, ngwaahịa na-ekpo ọkụ, usoro nlele, usoro ntinye tupu, unit pressurization na ngwa ngwa ngwa.
