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Our history
In the year 2006, DUHUI is a small factory manufacture wheel bearing and hub, only 15 workers.
In 2008 year, DUHUI attend the exhibition in Europe and South America etc to expand the business, then receive the positive feedbacks from our clients.
In 2010 year, DUHUI develop the other auto bearings, such as tensioner, release bearing, with more than 100 workers.
In 2014 year, DUHUI move to the new factory to fulfill the increasing capacity need from our clients.
In 2016 year, DUHUI establish professional sales and after sales team with more than 10 persons to the bettter service to our clients.



Our Products
Wheel bearing
Wheel bearing kits
Wheel hub
Tensioner
Timing belt kits
OAP
Hydraulic release bearing
…
Our Business Range
USA, CANADA,MEXICO, BRAZIL, ARGENTINA,PERU, CHILE,GERMANY, POLAND, FRANCE,UK,SWEDEN, RUSSIA, LITHUANIA, SPAIN, AUSTRALIA, THAILAND, LIBYA, JORDAN ,EGYPT And more than 100 countries.
We are looking forward to doing more business with your company, develop our business relationship, and also the friendship.
Our Mission & Vision
With the customer in focus and in selected markets to develop, produce and distribute quality spare parts for the automotive after-market.
We wish to be known for our customer DUHUI provide the qualified auto parts in efficient way, and make everyone use our parts to drive safely.
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Our history
In the year 2006, DUHUI is a small factory manufacture wheel bearing and hub, only 15 workers.
In 2008 year, DUHUI attend the exhibition in Europe and South America etc to expand the business, then receive the positive feedbacks from our clients.
In 2010 year, DUHUI develop the other auto bearings, such as tensioner, release bearing, with more than 100 workers.
In 2014 year, DUHUI move to the new factory to fulfill the increasing capacity need from our clients.
In 2016 year, DUHUI establish professional sales and after sales team with more than 10 persons to the bettter service to our clients.



Our Products
Wheel bearing
Wheel bearing kits
Wheel hub
Tensioner
Timing belt kits
OAP
Hydraulic release bearing
…
Our Business Range
USA, CANADA,MEXICO, BRAZIL, ARGENTINA,PERU, CHILE,GERMANY, POLAND, FRANCE,UK,SWEDEN, RUSSIA, LITHUANIA, SPAIN, AUSTRALIA, THAILAND, LIBYA, JORDAN ,EGYPT And more than 100 countries.
We are looking forward to doing more business with your company, develop our business relationship, and also the friendship.
Our Mission & Vision
With the customer in focus and in selected markets to develop, produce and distribute quality spare parts for the automotive after-market.
We wish to be known for our customer DUHUI provide the qualified auto parts in efficient way, and make everyone use our parts to drive safely.
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CNI fiber optic spectrometers with the characteristics of compact and portable design, plug and play, easy operation and Spectral Analysis 5.0 software downloads, can replace the old spectrophotometers. They are widely used in Laser wavelength and line width measurement and also the laser excitation fluorescence, Raman and LIBS spectrum measurement.
Fiber Optic Spectrometer with the advantages of modularization and flexibility of its measuring system is widely used to measure wavelength and line width of laser, LED and common light source, can accurately obtain the spectral characteristics of the light source which is being tested. CNI developed spectrometers with the characteristics of compact and portable design, plug and play, easy operation and Spectral Analysis 5.0 software downloads, which are extensively applied on the fields of scientific research, teaching, industries and many other applications. CNI can also customize the wavelength and resolution of the spectrometers according to different customers` demands.
High Resolution Spectrometer
Aurora 4000
High Sensitivity Spectrometer
Sunshine
Compact Spectrometer
Firefly 4000
Multi- channel Spectrometer
Rainbow series
Resolution is up to 0.1nm (FWHM)
Application: Laser wavelength
analysis; LED sorting; Chemical,etc
Quantum effciency is up to 80%
Application:Raman spectrum;
Semiconductor processing, etc
Compact and portable design
Application: Laser wavelength
analysis; Biochemical analysis, etc
That is made features of wide
spectral rang and high resoultion,
with synchronous delay device
Components & Accessories
HLS-1000 Halogen Tungsten
Light Source
TG series External Trigger Box
Fiber Holder
Fiber
Optical Signal Collector
4 Way Cuvette Holder
Sample Spectrum
Optical Fiber Spectrometer,X Ray Spectrometer,Fiber Optic Spectrometer,Custom Optic Fiber Spectrometer
Changchun New Industries Optoelectronics Technology Co., Ltd. , https://www.cnioptics.com