I loko o nā makahiki, ua hana ka ʻoihana i nā lako hana e pili ana i ka laina hana o nā capsules hollow paʻakikī, a hauʻoli nā huahana i kekahi inoa i nā mākeke honua a me ka home. I nā makahiki i hala iho nei, ʻo ka laina hana hollow capsule piha piha piha i hoʻomohala ʻia e ka ʻoihana mai kahi kiʻekiʻe kiʻekiʻe o kahi kiʻekiʻe kiʻekiʻe o ka ʻenehana hana capsule nui e hoʻohui ana i nā mīkini, uila, hydraulics a me nā pneumatics. Hoʻopili mau ka ʻoihana i ka manaʻo o ka "mea kūʻai mua, ʻoi aku ka maikaʻi", a ʻimi i ka maikaʻi i ka hana huahana, ka hana maikaʻi a me ka maikaʻi hilinaʻi. Kūʻai maikaʻi nā huahana ma nā ʻāina āpau, a lawe ʻia kekahi mau huahana i Kanada, Malaysia a me nā ʻāina ʻē aʻe a me Taiwan.