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SurSpider focus on Rebar Tier design&research since 2012,the newest ZKZ-40S,35S,25S,20S have 28 invention patents,it passed 1 million times life test, 99.2% tying success rate approved by SGS, very light and compact size---SurSpider always try best to make all kinds of rebar tying: Easier, Stronger and Faster
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