QWY Ножевая задвижка с двунаправленным уплотнением, стальной корпус с 2 сменными уплотнениями, ножевая задвижка, защитная крышка фланца для эффективной защиты корпуса клапана, увеличения срока службы клапана. Эта серия продуктов особенно подходит для обработки ила.
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