даже при
• Even with such defects single-heterostructure lasers with a room-temperature threshold as low as about 8000 amperes per square centimetre have been made.
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Русско-английский научно-технический словарь
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• Even with such defects single-heterostructure lasers with a room-temperature threshold as low as about 8000 amperes per square centimetre have been made.