SMC Drain Covers: (1)10 year experience. (2)OEM service, ISO9001:2000. (3)standard: EN124. SMC Drain Covers applications:(1) Electric power pipeling well;post,telecommunication,communication pipeline well; (2) Street lamp well,fire control well,all kinds of valve well;(3)City water,drainage pipeline well;heat supplied,gas well;(4)As cover board for anti-corrosion project,open ditch;it as well as ...