ʻO ka heleʻana o ka mea hana nui loa o ka mea hana nui o nā meaʻai nui o nā meaʻai he nui a me nā noi o nā mea kūʻai aku ma kahi oʻAmelika Hui PūʻIa. [3] ʻO ka mea hoʻokūkū koʻikoʻi wale nō ka mea elepani


ʻElua mau mea hou cylindrical i kūkuluʻia e ka heleʻana
ʻO ka halihali gefore e hana i nā huahana e pili ana i nā huahana e like me nā mea hana e like me nā mea hana e pono ai, a me nā wahi no nā locomote a me nā mea hou aku. ʻO nā locomotives i kēia manawa i kēia hana nui e pili ana i ka hanana hanana gevolution.

Ua hanaʻo GE i kāna locomotive mua i ka makahiki 1912, a hoʻomau i ka hanaʻana i nā switcher locomotives ma o nā makahiki 1920 a me 30s,ʻoiai e hana pū ana i nā mea hana uila. ʻO ke komoʻana i keʻano nui ma ka heleʻana o ka neʻeʻana o ka neʻeʻana me ka huiʻana me ka mea kūʻai aku ma ka nui o ka didam i ka papaʻaina gm. I ka hui pūʻana, lapalapa i kūkuluʻia i nā kino locomotive a me nā moina,ʻoiai ke hāʻawiʻiaʻana o ka mea kūʻai aku a me ka kūʻaiʻana aku.