| 2002-07 |
Passed ISO9001:2000 international quality system certification |
| 2005-07 |
Assumed our state industrial key project ¡°Measurement of the resonance frequency of loudspeaker cones based on virtual Instrument Technique ¡± |
| 2005-08 |
Accredited as ¡° NingBo hi-tech enterprise¡± |
| 2005-12 |
Passed ISO14001:2004 international environment system certification |
| 2005-12 |
TONWEL loudspeaker engineering &technology center was awarded as the Municipal- level center |
| 2005-12 |
Assumed our state torch- plan project ¡°Professional speaker enclosure based on suspended midrange driver technique¡± |
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