亚洲精品乱码久久久久久自慰,国产精品岛国久久久久

99视频精品全部免费在线,成人午夜亚洲精品无码网站,精品久久久久国产免费,天天操夜夜操,国产无套内射又大又猛又粗又爽,免费大片黄在线观看,亚洲综合av在线在线播放,亚洲乱亚洲乱妇50p,精品久久欧美熟妇www,国产日韩成人内射视频

WHO WE ARE

We are professional diamond and CBN manufacturer,
Making Efforts To Press Ahead is our Philosophy,
Achieving sustainable transmission is our goal.

Company display

Development History

Year 2003

the first set of resin bond CBN double-side surface grinding wheel was developed.
Year 2004

the wear-resistant high speed hydrostatic bearing grinding wheel was successfully put into the market.
Year 2004

Bold Vitrified CBN grinding wheel specialized for miniature bearing industry was successfully developed.
Year 2006

ISO9001 certification were passed as the first in this industry.
Year 2006

Zhengzhou Forture Tool Co., Ltd. Was established.
Year 2007

Bold metal bonded diamond grinding wheel was successfully developed.
Year 2007

High abrasion resistant glass grinding wheel was successfully put into the market.
Year 2008

Shanghai branch of Bold was established.
Year 2008

diamond grinding wheels with high sharpness grinding PCD tools were successfully put into the market.
Year 2008

diamond grinding wheels with high sharpness grinding PCD tools were successfully put into the market.
Year 2009

Bold was awarded the title of Henan hi tech enterprise.
Year 2009

we successfully developed a series of grinding wheels for monocrystalline silicon rod grinding in photovoltaic industry.
Year 2010

"Bold" trademark was awarded the title of "national famous brand".
Year 2011

we set up the research and Development Department of sophisticated abrasives.
Year 2012

Bold won the honorary title of "Henan province credit construction demonstration unit".
Year 2014

special silicon wafer grinding wheels for photovoltaic industry were developed and produced, which filled the gaps in this industry in China.
Year 2014

special grinding wheel for PV(photovaltaic) glass was developed.
Year 2014

high grade electroplated diamond (CBN) abrasives were developed and put into operation.
Year 2015

Bold Shanghai Pudong cutting tool branch was established.
Year 2015

The third factory of bold was established.
Year 2016

Xinxiang BYD abrasives Co., Ltd. Was established.
Year 2017

Xinxiang Boruite Super Material Co.,Ltd. Was established.
Year 2017

Shanghai YuCheng Diamond abrasives Co.,Ltd. Was established.
Year 2017

Xinxiang BSD abrasives Co., Ltd.was established.
Year 2018

Xinxiang Boruite Super Material Co., Ltd.was established.
Until 2018

Bold Group has owned 57 national patent technologies.

Quick navigation:

About Us
Products
News
Contact Us

Bold Group
Forturetools
Yucheng Diamond
BYD Abrasives
YuCheng
Malaysia: ADD: No.10 Dongqing Street,
High&New tech Development Zone.
Zhengzhou, Henan, China.
Postal code: 450001 E-mail：info@bold68.com
Phone: 0371-67662016 86162612