atụmatụ:

1, Rubber ahụ, ihe ọma

2, Agụba na gwara mmanụ na-abụghị conductive emep uta eri, na nso na ọkụ eletrik na ha na-arụ ọrụ-na gburugburu ebe obibi bụ nchebe iji.

3, 3 ọnụ ọgụgụ a na-e biri ebi site dị ink, doro anya, kpọmkwem. agụba n'elu unyi nwere ike na-asa, na ọnụ ọgụgụ nwere ike ịnọgide na-enwe anya.