tunnel bolt
USD $1.5 - $1.5 /Ton
Min.Order:1000 Tons
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Taicang Zhongbo Railway Fastening Co., Ltd
plastic dowel
rubber pad
insulator
Chinese I fastening system
Chinese II fastening
Product Details
Bolt for tunnel construction
1. Size: Dia. 3/4", 1", or M27 , Length= 400mm, 500mm
2. Material: Q235, C45
3. Surface protection: Hot dip galvanized
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