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Exclusive the  band edge grinding equipment and strict control and to ensure that the clamp edge ‘s smooth, greatly reducing the potential factors of hose material damage. Single lug clamp "ears" has a "ear nest" structure, because the “ear nest” reinforcement function, after tight  the "ears" become a spring can fine tune, in fitting encountered material expands wit heat and contracts with cold or mechanical vibration effects etc, can improve the effect of clamp the clamping force or play a role similar to the spring, so as to ensure the effective continuous clamping effect