Hartwan Site na ndụ ahịa, Hartwan nnukwu isi ụgbọ elu, Hartwan Elekere isi ụgbọ elu, Hartwan Elekere ahịa, na Hartwan Elekere isi ụgbọ elu na onwere ọtụtụ ngwaahịa. Ọbụkwara n'ịjụjụ
Hartwan Onye isi nnabata Hydraulic platform, Hartwan Elekere hydraulic, Hartwan Elekere ya, na Hartwan Elekere Hydraulic nwere ihe gbasara obere ike, uwe mma, ihe gbasara oru di iche iche, na nchekwa ndụ dị iche iche, nke na-efu Hartwan Hydraulic Elevator Co., Ltd Nnọ́ọ̀ nà Hartwan Nnyemaka