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  1. ... from left to right.Atomic radius increases from right to left, up to down. 2006-01-23 15:18:20 補充: For the melting point, the stronger the forces that act between molecules of...

    分類:科學 > 化學 2006年01月24日

  2. ... up to 0.4 % lead by weight and as a copper alloy containing up to 4 % lead by weight. 2006-08-09 14:49:06 補充: 7. —Lead in high melting temperature type solders (i.e. lead-based alloys...

    分類:科學 > 化學 2006年08月11日

  3. ...not verified this information, and cannot guarantee that it is up -to-date. Note also that the information on the PTCL Safety web...

    分類:科學 > 化學 2007年08月03日

  4. ... openings. Because of its high melting point, polypropylene can be hot-filled with products... process which alters their chemical make- up , and therefore are not reused http://www....

    分類:科學 > 化學 2005年05月06日

  5. ...many mothballs and your engine will load up with carbon deposits -- very bad news in the performance...反效果The most obvious was due to the high melting point ( 80C ), when the fuel evaporated the...

    分類:科學 > 化學 2007年05月09日