JB/T 13915-2020 Tower cranes Pre-tensioning and anti-loosening of high-strength bolts

Standard Number: JB/T 13915-2020(JB/T13915-2020)
Chinese:塔式起重机 高强度螺栓的预紧与防松
English:Tower cranes Pre-tensioning and anti-loosening of high-strength bolts

Effective Date:2021-01-01
Standard Applicability:

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