Yhmco DAJAAbout Us
2020
- NSF / ANSI / CAN 61
- NSF / ANSI 372
2014
- Welders get ASME Section IX Certification
- Acquire China Type Test Certification
2013
Certified to JIS B 2309
2012
Establish Daikawakenn Technology Co., Ltd. and Rotina DAJA Tiger-Vac Taiwan Co., Ltd.
2009
Certified to ISO9001 : 2008
2007
- Traded in OTC：2007.8.1
- Certified to JIS MARK
(JQA JIS B2312)
(JQA JIS B2313)
2002
- Invested in UHP
Components Production Line. - Certified to ISO 9001
(replacing ISO 9002)
1998
Certified to ISO140001
1994
Certified to ISO 9002
1981
Invested in Industrial Butt-Welding Pipe Fittings Production Line.
1977
Renamed and registered as Tachia Yung Ho Machine Industry Co., Ltd
1969
Renamed and registered as Tachia Yung Ho Machine Industry Limited Company.
1943
Tachia ironworks Established by Qing-Nian Huang.