1, zuru ezu tent nke ígwè waya eriri tupu eji, na waya eriri rigging nko kpọmkwem njikọ n'etiti ike, enweghị ike jikọọ nko n'ọnụ akụkụ;

2, eriri eriri abụọ tupu ejiri ya, eriri abụọ ahụ jikọtara ozugbo na nko abụọ, eriri abụọ na-ekokwasị na nko abụọ symmetrical stress center ọnọdụ; ojiji nke anọ eriri rigging, ọ bụla abụọ eriri eriri Na a kpọmkwem nko n'ime abụọ nko, ntị ka nko abụọ eriri rigging enweghị ike overlap na afanyekwa ọ bụla ọzọ, anọ eriri rigging symmetry na nko ike center;

3, ekwesịrị ịzere ihe ndozi na-ebuli elu mgbe akụkụ ebuli elu karịa 60 Celsius;

4, A machibidoro eriri eriri waya nke ọma, amachibidoro kọntaktị ozugbo n'etiti eriri igwe, a ga-agbakwunye ụdọ ma ọ bụ mgbanaka iche.

Ọ dị mkpa ịghọta na mejuputa atumatu arụ ọrụ. Ekwesịrị ịzere ụfọdụ ọrụ taboo ndị a kpọtụrụ aha n'elu. Nke a ga-arụ ọrụ dị mkpa n'ịkwalite nchekwa na ntụkwasị obi nke akụrụngwa n'onwe ya na ọrụ na arụmọrụ ọrụ.