Hatimi ci gaban fasaha mataki na hudu
Misali na yau da kullun a cikin tarihin hatimi shine hatimin pneumatic da aka cika cika a cikin 1970, wanda aka ƙera don riƙe fim ɗin mai a gefen wurin aikinsa kuma ana amfani dashi a cikin tsarin pneumatic mara amfani.Aikace-aikacen irin wannan hatimi, kawai yana buƙatar shigar da shi a lokacin lubrication na farko, wannan ƙirar har yanzu ana amfani da ita sosai.
Lokacin aikawa: Nuwamba-15-2022
