... acceptable Certificate: CE, ISO, BV, SGS, IKA, ETCAdvantage:The life time: more than 30000 hoursSamples for testing are available.The more ... 190-3400mm, which are used in the steel industry, harbor, coal industry, power industry, cement industry, etc2.Tube: Q2353.Shaft: 45# STEEL5.Bearing: Single ... according to the buyers' requirements conveyor belt for coal mining industry