Refractories need to be sprayed to the RH vacuum chamber and the snorkels.There are two kinds of spray-repair devices that are called suspending spray-repair vehicle and grounding spray-repair one.

• RH真空精炼装置的真空室插入管需视情喷补耐火材料,其喷补车有高架悬挂式与地面台车式两种型式。