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Had studied and developed seven
models as ZD40、ZD120、ZD300、ZD600、ZD900、ZD1200、ZD2400,
which is widely used in 23 provinces in China as well as exported
to USA, Canada, Netherlands, German, etc.
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Had developed six types: YT-I、YT-Å、YT-‰、YT-♯、YT-♭、YT-♪
room air purifiers and YT-C car air purifier
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