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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But he is only the fifth most borrowed author over the last 10 years, lagging behind Wilson, and romantic novelists Danielle Steel, Catherine Cookson and Josephine Cox.

BBC: Jacqueline Wilson most loaned author of the decade