Ka 2029, 'maraka oa li-valve tsa taolo ea oli ea camshaft o tla hola ka potlako: Schaeffler INA, Denso, Aisin, Fulin Permanent Magnet, BorgWarner, Hilite, Tiangong Automobile, Zhejiang Fujid, Sanguo, Delphi, Dilff, oli ea bokahohleng.

Indasteri ea morao-rao ea "World Market Report" ea camshaft ea nako ea taolo ea oli e akaretsa mekhoa ea morao-rao e bonoang 'marakeng oa lefatše. Patlisiso ena e etsoa ho pota menyetla ea morao-rao, joalo ka ntlafatso ea mochini, nts'etsopele ea lihlahisoa le katleho ea eona 'marakeng oa machabeng. Mmaraka oa li-valve tsa taolo ea oli ea camshaft o na le tlhaiso-leseling e bokelletsoeng ho tsoa mehloling e fapaneng ea bohlokoa le e thusang. Lintlha tsena li netefalitsoe ke litsebi le litsebi tsa khoebo, tse fanang ka tsebo e ngata bakeng sa ba amehang, bahlahlobi, batsamaisi le baetapele ba indasteri.
Tlaleho e boetse e fana ka kutloisiso e qaqileng ea libaka tse kholo tsa mmaraka le likarolo tsa bohlokoa tsa mmaraka le likarolo tsa mmaraka. Tlaleho e hatisitse boemo ba nts'etsopele ea libaka, ho kenyelletsa le boholo ba 'maraka, kabelo le molumo. Ntle le moo, tlaleho e akaretsa lintlha tsa moetsi, ho kenyeletsoa kabo ea khoebo, litšenyehelo le litheko, phaello le kakaretso ea chelete. Sena se lumella babali ho utloisisa boitšoaro ba bareki le ho utloisisa hamolemo mesebetsi ea bahlolisani ba ka sehloohong 'marakeng.
Likhamphani tse etelletseng pele 'marakeng li kenyelletsa: Schaeffler INA, Denso, Aisin, Fulin PM, BorgWarner, Hilite, Tiangong Motors, Zhejiang Fuljid, Sanguo, Delphi, Dilff, Universal Injection.
Likarolo tsa 'maraka ho ea ka sebaka/naha, ho kenyeletsoa: Amerika Leboea (United States, Canada le Mexico) Europe (Jeremane, United Kingdom, France, Italy, Russia, Spain, joalo-joalo) Asia Pacific (Chaena, Japan, Korea Boroa, India, Australia le Asia Boroa-bochabela) joalo-joalo) Amerika Boroa (Brazil, Argentina le Colombia joalo-joalo) Bochabela bo Hare le Afrika (Afrika Boroa, UAE le Saudi Arabia joalo-joalo)
Patlisiso e senola tlhahlobo e felletseng ea likarolo tsa boleng le palo ea litsebi tse ngata tsa indasteri, hammoho le baetapele ba maikutlo a bohlokoa le baetapele ba bohlokoa ba maikutlo, e le ho etsa tlhahlobo e tebileng ea litloaelo tsa mmaraka le indasteri. Ntle le moo, tlaleho e fana ka kakaretso e felletseng ea litebello tsa nalane le tsa hajoale tsa mmaraka, ho kenyeletsoa ponelopele ea nako e tlang ea tsoelo-pele ea theknoloji, tlhahlobo ea tlhokahalo le phepelo, lintlha tse nyane le tse kholo tsa moruo, lintlha tsa taolo, le mohlala oa nts'etsopele ea mmaraka oa li-valve tsa oli tsa camshaft. Tlaleho e totobatsa maano a bohlokoa a amohetsoeng ke barupeluoa ba ka sehloohong ba mebaraka.