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Changyutkich
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Changyutgich-havo oqimi orqali so'rilishi sababli sirtlardan chang va ifloslantiruvchi moddalarni tozalash mashinasi. Chang va ifloslanish chang kollektorida to'planib, undan muntazam ravishda olib tashlanishi kerak. Birinchi changyutgichlar AQShda 1869-yilda ishlab chiqarilgan.
Elektr supurgi maqsadga muvofiq maishiy (shu jumladan, sigaret chiroqidan ishlaydigan avtomobil) va sanoat, ko'chma va statsionar bo'lishi mumkin.
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