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      <title>주변에서 마찰이나 공기 저항이 작을수록  작동이 잘되는 기계나 장치 찾기 by 박미진선생님</title>
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      <pubDate>2021-05-17 00:55:18 UTC</pubDate>
      <lastBuildDate>2023-02-20 18:10:43 UTC</lastBuildDate>
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         <author>jukjeon941</author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1530076422</link>
         <description><![CDATA[<div><strong>20932 박물리</strong><br>베어링:회전축의 마찰로 인한 열에너지를 줄이기 위하여 작은 쇠구슬(베어링)과 윤활유를 함께 장치한다.</div>]]></description>
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         <pubDate>2021-05-17 06:15:56 UTC</pubDate>
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         <title>20125 연병수</title>
         <author>jukjeons200104</author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533536415</link>
         <description><![CDATA[<div>화물선: 물과의 마찰을 줄여 연료 소비를 줄이고 더 잘 나아가기 위해 선체 표면에 윤활유나 점액을 바른다.</div>]]></description>
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         <pubDate>2021-05-18 00:24:29 UTC</pubDate>
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         <title>21016 김영환</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533549781</link>
         <description><![CDATA[<div>증기기관</div>]]></description>
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         <pubDate>2021-05-18 00:29:54 UTC</pubDate>
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         <title>20122 박경일</title>
         <author>jukjeons200162</author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533550049</link>
         <description><![CDATA[<div>창문을 열고 닫을 때 마찰력이 작아<br>야 잘 열리고 닫힙니다</div>]]></description>
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         <pubDate>2021-05-18 00:29:58 UTC</pubDate>
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         <title>20818 최연지</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533552730</link>
         <description><![CDATA[<div>마찰력을&nbsp;줄여 서랍장의 문을 쉽게 열기 위해 서랍장 양쪽에 작은 쇠구술이 들어있는 슬라이드가 붙어있다.</div>]]></description>
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         <pubDate>2021-05-18 00:30:55 UTC</pubDate>
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         <title>20617 안도영</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533555583</link>
         <description><![CDATA[<div>피젯스피너에 베어링을 사용해 마찰열을 줄인다.</div>]]></description>
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         <pubDate>2021-05-18 00:31:35 UTC</pubDate>
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         <title>20109 이준서</title>
         <author>jukjeons200315</author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533557430</link>
         <description><![CDATA[<div>자동차&nbsp;바퀴의 마찰을 줄여 에너지 낭비를 막는다.</div>]]></description>
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         <pubDate>2021-05-18 00:32:18 UTC</pubDate>
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         <title>20220 박해승</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533566669</link>
         <description><![CDATA[<div>미닫이문에서 문과 문틀의 마찰이 적어야 한다.</div>]]></description>
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         <pubDate>2021-05-18 00:35:48 UTC</pubDate>
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         <title>20624 임형준</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533570118</link>
         <description><![CDATA[<div>자동차 날개(스포일러)<br><br>자동차는 매우 빠르게 달리므로 관성저항이 커서 난류 혹은 와류가 생기게 된다. 자동차 날개는 차량 뒤쪽의 와류 발생을 줄여준다. 이를 통해 연비향상을 기대할 수 있고, 차량이 붕 뜨는 현상도 막을 수 있다. 주행의 안정감도 더해 줄 수 있다.&nbsp;<br><br></div>]]></description>
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         <pubDate>2021-05-18 00:37:05 UTC</pubDate>
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         <title>20125 이준하</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533570166</link>
         <description><![CDATA[<div>마찰력을 줄여 더 오랫동안 회전하도록 한다</div>]]></description>
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         <pubDate>2021-05-18 00:37:06 UTC</pubDate>
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         <title>20213 한미성</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533575510</link>
         <description><![CDATA[<div>자기 부상 열차는 바퀴가 레일에 접촉하지 않고 움직이게 하여서 접촉면의 마찰을 아예 없앤다.</div>]]></description>
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         <pubDate>2021-05-18 00:39:06 UTC</pubDate>
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         <title>20826 위서준</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533576654</link>
         <description><![CDATA[<div>엔진 실린더<br>엔진 실린더 움직일 때 마찰이 생기면 엔진부품이 망가지고, 출력을 제대로 못 낸다.</div>]]></description>
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         <pubDate>2021-05-18 00:39:33 UTC</pubDate>
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         <title>20616송진혁</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1533578490</link>
         <description><![CDATA[<div>인라인 스케이트&nbsp;</div>]]></description>
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         <pubDate>2021-05-18 00:40:18 UTC</pubDate>
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         <title>20805 박서정</title>
         <author></author>
         <link>https://padlet.com/jukjeon941/lpnanh3bb48at49c/wish/1551534319</link>
         <description><![CDATA[<div>높낮이&nbsp;조절이 가능한 의자의 중심 봉에 윤활유가 발라져있다.</div>]]></description>
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         <pubDate>2021-05-23 16:41:01 UTC</pubDate>
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