Similarly, in mining and construction industries, they contribute to increased productivity and cost-effectiveness Similarly, in mining and construction industries, they contribute to increased productivity and cost-effectivenesspdc drill bit. PDC drill bits also find application in geothermal energy exploration, where they can withstand the harsh conditions encountered in deep drilling operations.molded frp gratings are manufactured in a one piece construction which results in a bi-directionally strong product. This allows openings for piping or cables in the grating of up to 10” without any additional support required (may vary depending on grating depth and location of opening). During the molded manufacturing process, the continuous fiberglass rovings are completely covered in a high percentage of resin, 65% by volume. With this high resin content, molded gratings are the most chemically resistant gratings offered and are often used in caustic chemical environments without hesitation.