{'fraction_non_alphanumeric': 0.01646090534979424, 'fraction_numerical': 0.00411522633744856, 'mean_word_length': 4.597701149425287, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 1, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Development of the aerodynamic window for high-power CO laser

To develop an aerodynamic window for high-power CO lasers, we made a prototype of an air exhausting window. This prototype was consisted of four orifices and two vacuum pumps, and the optical axis coincided with gas flow direction. It was fixed to 5kW CO laser machine and the performance was tested. The result of experiments showed the good air exhausting property and the successful extraction of over 2kW CO laser beam.