Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
열가소성의 재료는 높은 온도에서 쉽게 형상을 바꿀 수 있습니다.yeolgaseoseong-ui jaeryoneun nop-eun ondoseo swibge hyeongsang-eul bakul su issseubnida.Thermoplastic materials can easily change shape at high temperatures.