document.writeln('

                 L型二通 BPL  4-01

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T型三通             BPE Φ4

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螺纹直通          BPC12-04

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  铁镀铜对丝

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    BPG 直通变径 10-8

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             加厚铜球阀

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                          BPU 直通 Φ

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                                   B

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');