魔方棱块曾经也是全封闭的
<P>最早的魔方是木头做的，肯定是实心的。</P><P><IMG src="http://www.speedcubing.com/ton/images/Rubiks_foto_of_Prototype_1975.jpg"></P>
<P>我这介绍的是指批量生产时的塑料魔方，目前就算是最好的魔方棱块都没全封闭的，如图：</P>
<P>虽然边块还是空心的，但是角块却全部是实心的（准确的说，应该是封闭的空心）：</P>
<P> <IMG src="http://cat.sitral.com/images/ebay/魔方块.jpg"></P>
<P>贴 Cube_Master 国内较好的 3阶魔方图片过来看看：</P>
<P><BR><IMG src="http://bbs.mf8-china.com/photo/03.jpg"></P> <P>１、1979年德国版的魔方：</P>
<P><a href="http://www.speedcubing.com/ton/pages/Rubik%27s%2001%20Politechinca%201979%20square%20sticker%20Germany.htm" target="_blank" >http://www.speedcubing.com/ton/pages/Rubik%27s%2001%20Politechinca%201979%20square%20sticker%20Germany.htm</A></P>
<P><IMG src="http://www.speedcubing.com/ton/images/Rubik's%2001%20Politechinca%201979%20square%20sticker%20Germany.jpg" border=0></P>
<P>拆开，</P>
<P><IMG src="http://www.speedcubing.com/ton/images/parts__1979_.JPG"></P>
<P>可以看出棱块虽然不是实心的，但是是全封闭的：</P>
<P><IMG src="http://www.speedcubing.com/ton/images/edge1_1979_.JPG"> <IMG src="http://www.speedcubing.com/ton/images/edge2_1979_.JPG"> </P>
<P>２、1980年美国版本的魔方：</P>
<P><IMG src="http://www.speedcubing.com/ton/images/Rubik's%2002%20Magic%20Cube%20Logical%20Games%20(Bela%20Szalai)%201980%20USA.JPG"></P>
<P>其棱块也是全封闭的：</P>
<P><IMG src="http://www.speedcubing.com/ton/images/Magic%20Cube%20Pieces.JPG"></P> <P>３、还有这个ebay上找的“古董”魔方，也是这样的：</P>
<P><STRONG><FONT color=#44cc44>Very rare Pentangle Magic Cube, actually "pre-Rubik's-Cube" from the late 1970s.</FONT> That's right, "pre-Rubik's-Cube". At the very beginning Erno Rubik's invention was only called "(The Hungarian) Magic Cube", only later was it renamed to "Rubik's Cube". This is one of the earliest cubes produced, a piece of cube and UK history (Pentangle distributed the cube in UK, first introducing it to the western world).</STRONG></P>
<P><BR><BR><BR><a href="http://bbs.mf8-china.com/data/attachment/forum/dvbbs/2005-10/2005102822171054050.jpg" target="_blank" ><IMG src="http://bbs.mf8-china.com/data/attachment/forum/dvbbs/2005-10/2005102822171054050.jpg" border=0></A></P>
<P><a href="http://bbs.mf8-china.com/data/attachment/forum/dvbbs/2005-10/200510282220741752.jpg" target="_blank" ><IMG src="http://bbs.mf8-china.com/data/attachment/forum/dvbbs/2005-10/200510282220741752.jpg" border=0></A></P>
<P>见：<a href="http://bbs.mf8-china.com/dispbbs.asp?boardid=13&replyid=1479&id=1479&page=1&skin=0&Star=1" target="_blank" >http://bbs.mf8-china.com/dispbbs.asp?boardid=13&replyid=1479&id=1479&page=1&skin=0&Star=1</A></P> 魔方棱块有没有全封闭对魔方的快速旋转有关系吗？我觉得可能影响不大的。不然为何经过二十多年后的今天，不采用这种棱块呢，另外这与生产魔方的成本、工艺等也有关系了。 看起来就是爽 <P>４、这种的棱角块封闭的盖子干脆也不盖了</P>
<BR><BR><BR> <P>棱块：</P>
<P><BR><BR></P>
<P>角块：</P>
<P><BR></P> <P>５、这种就没打算把棱块全封闭了，就直接在棱块侧面开模了：</P>
<BR><BR> 不错，看着不错，， 欣赏哦。