O：Indicates the content of this hazardous substance in
the all materials of the device is lower than the required
volume in the standard of SJ/T 11363-2006.
X：Indicates the content of this hazardous substance in
the all materials of the device is higher than the required
volume in the standard of SJ/T 11363-2006.
Note: this device is marked with“X” because at present
there is no alternative technology or parts for
replacement.
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