... of Composite Material With Regenerated Resin for the sewer drainer, frame cover, drainer, manhole cover We can also supply various kinds ... is widely used in the checking well of cables, waist water, electrics, gasespipes underground. Featuress: 1) Against theft: the material is ... modulusis >0.354) Anti Aging: Put it into a temperature and wet equipment,use Xenon light at 60¡ãC ¡À >5¡ãC ...