Official spraying, spraying test of a construction zone (above), the fire department, pertaining to quality supervision station after passing another large-scale operations.
Official spraying, spraying test of a construction zone (above), the fire department, pertaining to quality supervision station after passing another large-scale operations.
正式喷涂前,应试喷一建筑层（段）,经消防部门、质监站核验合格后，再大面积作业。