Large-diameter cylinders dedicated smooth ring to check cylinders tail cone outer thread, taper. We not only provide plug and ring gauges threaded, but also provide a smooth cylinder cone-shaped plug and ring gauges. Cylinders dedicated thread gauge (PZ) has PZ19.2, PZ27.8, PZ30.3, PZ39 four specifications; take full advantage of our many years of experience in design and production, optimize the product mix, and strive to variety, quality Stable. Enterprise autonomy has improved detection capabilities, based on user requirements and design drainage, HVAC special structural aspects of various products. My company has a strong productivity and competitiveness of the industry, the factory has a threaded plug manufacturing department, manufacturing department threaded ring, smooth plug Manufacturing Manufacturing smooth ring, thread gauges manufacturing department. Our products are widely used in the oil, chemical, coal, power plants, research, shipbuilding, environmental protection, construction, machinery, metallurgy, fertilizer, paper, energy, biomedical, refrigeration, food, beverage, pharmaceutical, hospital, precision electronics, fine chemicals, electricity, painting surface cleaning and other areas and other industries.