1. Ukubuka Okujwayelekile Le nqubo ihlanganisa amashubhu ensimbi angenamthungo ama-boilers omusi kanye namapayipi, kufaka phakathi amashubhu adonswayo abandayo, adonswayo ashisayo, acindezelwe ashisayo kanye nancishisiwe. Ubukhulu: amashubhu adonswayo ashisayo OD 25-530 mm, ubukhulu bodonga 2.5-90 mm; amashubhu adonswayo abandayo OD 25-108 mm, ubukhulu bodonga...
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