" yubeng " brand butter pump adopt national inventing patent technology " multi - grade high - pressure coaxial connecting structure " patent no . 20042005191 . x . blooey rate reduces and improves using time “玉泵”牌黄油泵采用了国家发明专利“多级高压泵同轴联接机构”技术，专利号200420005191 . x 。运行故障率大大减少，提高了使用寿命。
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