JT/T 876-2013 External prestressing tendons of filled epoxy-coated strand. 1范围 JT/T 876规定了填充型环氧涂层钢绞线...
JT/T 876-2019 填充型环氧涂层钢绞线体外预应力束
JT/T 876-2019 I External prestressing tendons of filled epoxy-coated strand. 1范围 JT/T 876规定了填充型环氧涂层钢...