Note
Fiberglass manhole cover has obvious advantages in weight. Due to the use of high-strength glass fiber and lightweight synthetic resin, its overall density is small, so its weight is much lighter than traditional cast iron or cement manhole cover. This feature not only facilitates transportation and installation, reduces labor costs and time, but also makes the construction process more efficient and convenient. For example, in some maintenance scenarios where the manhole cover needs to be opened and closed frequently, the light weight greatly reduces the workload of operators.
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