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two die four blow cold forging machine

Three die six blow cold forging machine

wire drawing machine

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Washer assembling machine

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die tooling

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Hot Dip Galvanizing Line

New Products: Round type thread rolling machine

automatic screw packaging machine

HSD-30 Bi-metal Rivet Machine

Hydraulic Pipe Bending Machine

Contact Us: Harbin Rainbow Technology Co., Ltd.Address:C2-02 Handi Building,Songbei Distr.,Harbin,ChinaPostal Code:150028Web site address:http://www.fastenerequip...

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Working principle of nut tapping machine

Nut tapping machine is a kind of machining equipment that processes internal threads, screws or teeth buckles on the inner side of the holes of variou...

Thread Rolling

Tightening bolts can not be ignored friction can cause problems to solve the problem

fortensionbolt, The friction force is a factor to be reckoned with. Bolt friction joint has been in existence, it may be part of the reason that cause...

When to Use Spring Washers: A Comprehensive Guide

Difference between hot dip zinc and hot dip galvanising

Hot-dip zincing and hot-dip galvanising are two different processes for corrosion protection of metals, with hot-dip zincing usually providing better ...

Pros and Cons of Cold Forging and Hot Forging

Products: Continuous mesh belt furnace; 4 Spindle Automatic Tapping Machine; Automatic High Speed Screw Cold Heading Machine; Six Die Nut and Part Forging Machine; 4 Station Bolt Making Machine

About Rainbow

Our company comes from China National Machinery Import and Export Corp. Harbin branch. By many years market development and experience accumulation,n...
Overseas Business

Wehave attended many mainland & overseas exhibitions, such as Puneexhibitions , Mumbai exhibitions, and Shanghai exhibitions. Now we give some picture...
Corporate Responsibility

We are committed to integrating corporate and social responsibility andthe principle of sustainable development into business operation andmaking cont...