Ahakoa he iti ngā rawhi ngongo, he mea nui ngā here e whakamahia ana i roto i ngā pūnaha motuka, mīhini, putorino me ngā pūnaha wai puta noa i te ao. I roto i te rautau kua hipa, kua tino rerekē te hoahoa, te hanganga me te mahi kia tutuki ai ngā paerewa ahumahi teitei ake, te pakari ake me ngā tikanga mahi uaua ake.
I te tīmatanga o te rautau 20, he māmā noa iho, he taketake hoki ngā rawhi ngongo. Ko te nuinga he waea rino ngohengohe, he waea parahi rānei, ā, i whakawhirinaki ki te miro ā-ringa hei whakau i ngā ngongo. He pēhanga kāore i te ōrite, he ngāwari te pakaru o ngā paipa, ā, he ngoikore te mahi i raro i te pēhanga, i te wiri rānei. I mahi noa ēnei tauira taketake mō ngā tono pēhanga iti, tono iti.
I te tekau tau atu i 1920, i kitea he huringa nui i te putanga mai o te rawhi ngongo taraiwa-kutukutu. Nā tōna hanganga tīwiri-me-te-rīpene i taea ai te pēhi ōrite me te whakarerekētanga ngāwari. I tere tonu te noho hei hoahoa matua, ā, i tautoko i te tipu tere o te umanga motuka.
Mai i te tekau tau atu i 1950 ki te tekau tau atu i 1980, nā ngā tono hangarau i akiaki te auahatanga. I puta ake ngā rawhi taringa, ngā rawhi T-bolt me ​​ngā rawhi V-band mō ngā taiao taumaha, pāmahana teitei me te wiri nui. I nekehia ngā rauemi mai i te maitai noa ki te maitai kore waikura, ā, i tino whakapai ake i te ātete ki te waikura me te roa o te mahi.
I ngā tekau tau tata nei, kua tino tika ake, kua motuhake ake hoki te hoahoa o ngā rawhi ngongo. Kua whakauruhia e ngā kaihanga ngā rawhi kume-pūmau, ngā taha iti-kōtaha me ngā hanganga tuku tere. He māmā ake ngā rawhi hou, he pono ake, ā, he hototahi ki ngā waka hiko, ki ngā pūnaha hiko hou me ngā āhuatanga matū kino.
I ēnei rā, ehara ngā rawhi ngongo i te mea he mea here noa iho, engari he mea hanga kia haumaru, kia whai hua hoki. Ko tōna whanaketanga roa e whakaata ana i ngā whanaketanga o te pūtaiao rauemi, te hoahoa ahumahi me te hangahanga o te ao. I te haere tonu o te whanaketanga o te hangarau, ka whakapai tonu ngā momo rawhi ngongo hei tautoko i te whānuitanga o ngā ahumahi i roto i te huarahi pono me te pumau.