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<p>원형덕트 구하기 및 마찰손실도 어떻게 찾아야 하나요?</p><p>말 그대로 원형덕트 50mm단위로 찾아야 하나요</p><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1BpBA/f7e4e7d2ccd377d5327087c8d05f6b9634ddaf2c" class="txc-image" data-img-src="https://t1.daumcdn.net/cafeattach/1BpBA/f7e4e7d2ccd377d5327087c8d05f6b9634ddaf2c" data-origin-width="3468" data-origin-height="4624"></div><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1BpBA/abe59d348983bf6f8912f24fd6e3d1533aef500b" class="txc-image" data-img-src="https://t1.daumcdn.net/cafeattach/1BpBA/abe59d348983bf6f8912f24fd6e3d1533aef500b" data-origin-width="3468" data-origin-height="4624"></div>
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