In a vertical pipe, actual concentration of materials under delivery is greater than the one at its outlet due to lagging effect.
颗粒滞留效应，将导致在垂直管流中物料的当地浓度大于输送浓度。
But they 've got to be wrapped in lagging, remember. and in two places I need to cross a conduit with a 35 millimetres cold feed pipe. There's just not enough space.
但管外还要包隔热层而且电线管在两处要与35毫米的冷水管交叉，地方恰好不够。
The outside steel lagging fastens both ends of the pipe and wrap the gasket ring to realize the tight coupling between pipes.
外钢套扣住钢管两端并包裹密封圈。实现钢管密封连接。
The outside steel lagging fastens both ends of the pipe and wrap the gasket ring to realize the tight coupling between pipes.
外钢套扣住钢管两端并包裹密封圈。实现钢管密封连接。
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