Njirimara ngwaahịa
1. kọmpat Ọdịdị, ezi uche imewe, ezi rigidity nke valvụ, ezigbo uzo na obere eruba nguzogide ọnụọgụ.
2. A na-eji igwe anaghị agba nchara na cemented carbide na-arụ ọrụ ogologo oge na-ekpuchi elu.
3. Mgbanwe graphite nkwakọ ngwaahịa, a pụrụ ịdabere na akara, mfe na mgbanwe ọrụ.
4. Ụdị ịkwọ ụgbọala gụnyere akwụkwọ ntuziaka, eletriki, pneumatic, nnyefe ngwa na ụdị nhazi; na-agbanwe wedge otu valvụ, eriri valvụ otu valvụ siri ike na ụdị ọnụ ụzọ abụọ.
5. A na-eji ya eme ihe na ngwaahịa mmanụ, mmiri na uzuoku pipeline nke mmanụ ala, ụlọ ọrụ kemịkalụ na ọkụ ọkụ dị ka mmalite na mmechi ngwaọrụ maka ijikọ ma ọ bụ bepụ ọkara na pipelines.