द इंटेंसिटी ऑफ प्रिंसिपल मैक्सिमम स्पेक्ट्रम ऑपरेटिंग विद ए मेंबर ऑफ लाइन इन प्रोफेशनल दो
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A laser pointer or laser pen is a small handheld device with a power source ... The output power of a laser pointer is usually stated in milliwatts (mW). In the U.S. lasers are classified by the ..
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