Hebei Tianlong Fasteners Co., Ltd
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Main Products: · 8.8 class 10.9 class 12.9 class all bolt/nut · Special accessories for coal mine support, rail transit engineering accessories, building structure connectors · Covering GB , DIN , ASTM , BS , JIS, ISO and other standard systems · Custom stainless steel, copper, aluminum alloy and other special material products and special-shaped non-standard parts