Nika CylindricalSpur GearAna Amfani da Injinan Haƙon Noma Mai Rage Injin Mai
Manyan kamfanoni goma a china, sanye take da ma'aikatan 1200, sun sami duka abubuwan ƙirƙira 31 da haƙƙin mallaka na 9. Na'urorin masana'antu na ci gaba, kayan aikin zafi, kayan aikin dubawa.