PPH quvurlarini issiq eritish bilan payvandlash asosan 7 bosqichga bo'linadi: bo'shatish, oldindan isitish, moslashtirish, isitish, payvandlash, sovutish va tekshirish.

PPH quvurlarini issiq eritish bilan payvandlash asosan 7 bosqichga bo'linadi: bo'shatish, oldindan isitish, moslashtirish, isitish, payvandlash, sovutish va tekshirish.
