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注：若用户需用阀板衬橡胶等特殊要求订货时请注明。Notice:If the customer has any special requirements such as disc whit rubber lining etc.Please specify while ordering.
注：若用户需用阀板衬橡胶等特殊要求订货时请注明。Notice:If the customer has any special requirements such as disc with rubber lining etc.Please secify while ordering
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