Official classification context
Industry overview This class comprises establishments principally engaged in pulveriz ing diatomaceous earth and manufacturing diatomaceous earth bricks, hot plates, and other diatomaceous earth products.
Major group context CLAY PRODUCTS This Major group comprises establishments engaged in manufacturing plate (flat) glass and other glass products, cement and its products, clay products for construction, ceramics, refractory products, carbon and graphite products, ename l-covered iron products, abrasive grains, aggregates, stone products, gypsum products, lime products. Group Class Number Number