CP-9B PH Meter
- Product Description
Easy to be operated. When measuring PH,please wear glasses,adjust the middle knobs in the left and right,from boresight of eyes which get through lenses to the lowest bottom of glasses is ok. It's also an essential tool for optometry of progressive glasses. 
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Contact:
Mr. Li YiyangTel:
+86 15001978117Fax:
+86-21-50301363E-mail:
jiahe@jhoptical.com-
