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.FEATURES :(1) In the longitudinal direcition , rock body has equal tensile strength ,that is about 40% higher than the reverse-twist bolt in the same specification .
(2) Extend the support area , not only be used by end anchoring ,but also be used by fully anchoring ,that has a better support efficiency .a
(3)Low price, widely used in coal mines, railways, hydropower and other types of roadway projects.
