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        Welcome Guangzhou Yonglong Hardware Manufacturing Co. Ltd. - wing produced will be fine National unity 24 hours service hotline:086-020-81762527 Chinese | English
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        Guangzhou Tel: 020-81762527, 81012789,
        81272884, 81752336
        Fax: 020-81764254, 81752439
        Company website: http://www.scdxcfo.net
        Email, Guangzhou: gzyonglong168@126.com
        Hubei hbyonglong@163.com
        Headquarters address: No. 16, Tan tail Road, Liwan District bridge, Guangzhou, China
        Hubei address: No. 50 Hubei road Zhongxiang xinmeixiang
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        Welding nail patent certificate
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        此為國內最早的焊釘專利證書,標誌著我國能用自己的設備自己的技術生產合格的焊釘了。對當時國內幕牆行業成本的降低有一定貢獻。

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