... second usage value, so its against theft.2. convenience and good appearance, the weight is only one third that of the ... ,000 Ton per year with 150 staffs as the year 2012.Q3: What’s your advantage?A3: 1, we have lots ... ’ market demands and also as a promise of our material quality, like the RoHS, UL, CCC, ISO9001, etc.3, we, as ... cared about here. SMC BMC GRP FRP material manhole cover (good quality)