Chelik yong’inga qarshi panjur jamoat joylarida yong’inni ajratish va yong’inga qarshi bo’linish uchun muhim yong’inga qarshi vositadir. Mashina va elektr jihozlarining keng qamrovli ishlashining yong’inga qarshi mahsulotidir, shuning uchun o’rnatilgan yong’in qopqog’i har doim normal holatda bo’lishi kerak.

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