角铝和万能角钢的比较

小弟刚入行，有些问题请大侠指教

做led显示屏要用角铝固定单元板，但是角铝要打孔很麻烦，为什么万能角钢很少用呢？万能角钢应该很便宜啊，而且强度高，使用方便无需打孔，两三年内不会生锈吧

没什么印象，万能角钢是什么样的啊？？发张照片来看看吧

不懂，没看过！
{:1_128:}{:1_128:}{:1_128:}

是不是货架就是用那万能角刚啊，上面有好多的对称的孔。

20路可编程控制器上市了！！！ 白发红50 白发黄50 白发绿80 白发蓝80 白发白100 双色灯170 单元板全面调整 20路控制器全面上市 ——本文来自〖www.521LED.com〗原帖地址：http://www.521led.com/viewthread.php?tid=2999&fromuid=3992

{:1_121:}{:1_121:}——本文来自〖www.521LED.com〗原帖地址：http://www.521led.com/viewthread.php?tid=2999&fromuid=4284{:1_121:}——本文来自〖www.521LED.com〗原帖地址：http://www.521led.com/viewthread.php?tid=2999&fromuid=4284

chengyi2540——本文来自〖www.521LED.com〗原帖地址：http://www.521led.com/viewthread.php?tid=112&fromuid=4251
{:1_118:}

[whitepad]***400;200;400,200;;** m243,35 l184,35,173,36,164,38,153,40,144,43,137,45,131,48,119,56,115,60,103,68,96,73,92,76,87,80,82,83,79,87,70,96,65,99,63,102,57,108,52,111 51,112,47,115,45,115,44,117,42,118,41,120,40,120,38,121,37,122,35,123,33,125,32,125,30,126,27,127,26,127,24,129,28,129,30,127,32,127,34,125 36,124,38,124,40,123,42,121,44,121,45,120,47,119,48,119,49,118,51,117,55,113,56,113,57,111,59,109,60,107,61,106,61,103 e|********* m40,123 l43,123,45,125,49,125,51,126,60,126,62,124,64,123,65,123,67,122,68,121,69,119,71,118,72,116,77,111,79,110,83,106,84,104,87,101,88,101,88,100 89,100,89,96,88,94,86,92,86,90 e|********* m87,95 l87,96,90,96,91,95,91,94,92,92,93,91,93,88,91,86,90,84,90,83,89,83 e|********* m88,98 l91,98,92,97,94,96,95,95,96,95,98,94,99,93,100,93,103,90,104,90,105,89,105,88,107,88,109,86,111,86,113,84,115,84,117,82,119,81,120,80 121,80,126,75,126,73,127,72,127,68 e|********* m128,75 l128,76,133,71,134,69,134,65 e|********* m134,78 l135,77,154,77,156,75,158,75,160,73,163,73,164,72,166,71,167,70,168,70,170,69,171,68,172,68,174,67,175,66,177,66,179,64,180,64,180,63,181,63 182,62 e|********* m239,33 l241,35,243,38,244,40,244,41,248,45,248,47,250,48,251,50,253,51,253,52,254,54,256,56,257,56,257,51 e|********* m237,53 l236,54,214,54,213,55,209,55,207,56,206,57,202,57,201,58,198,58,197,59,190,59,189,60,182,60,180,62,178,62,176,64,174,64,173,66,171,67,170,69 169,70,169,71,168,73,167,74,167,77,165,79,164,82,164,84,163,85,161,88,161,90,160,91,159,93,157,94,154,97,154,98,151,101,149,102,148,104,147,105 146,107,144,109,144,111,142,113,142,117,143,117,143,118,144,118,146,119,147,120,149,121,150,122,151,122,152,123,166,123 e|********* m252,68 l242,68,240,70,238,70,234,71,233,72,231,73,229,73,223,76,220,78,218,79,217,80,213,80,210,82,209,83,206,83,205,84,203,85,202,85,201,86,199,87 198,87,196,88,194,90,192,91,191,92,189,92,186,94,184,95,183,95,181,96,180,97,179,97,177,98,171,104,170,106,169,107,168,109,168,110,167,114,166,115 165,117,165,132,166,133,166,135,168,136,169,136,170,137,172,138,173,138 e|********* m255,77 l252,77,250,79,248,79,244,83,241,85,239,86,238,87,237,87,232,90,231,91,228,92,226,94,224,94,220,98,218,98,217,99,215,100,212,102,208,106,206,107 205,107,202,110,201,112,197,113,196,114,195,114,192,115,190,116,189,117,187,117,185,119,183,119,181,121,179,121,178,123,176,124,176,125,175,126,175,130,176,132 177,133,179,134,181,136,183,136,184,137,187,138,189,139,200,139 e|********* m171,138 l172,138,174,137,175,136,179,136,181,134,184,134 e|********* m282,90 l280,92,278,97,277,103,273,110,269,119,266,127,264,134,261,140,258,144,258,145,256,149,254,152,254,154,252,157,252,158,251,160,250,161,249,163,247,165,246,167 244,169,243,169,241,170,224,170,219,169,213,165,210,165,206,163,202,163,201,162,199,161,198,160,196,159,196,158,195,158,195,157,194,157,193,156,190,156,188,154 184,154,183,153,181,152,180,151,180,150,179,149,178,149,178,144,179,143,181,143,182,142,190,142,191,143,193,144,196,144,198,146,199,148,199,149,200,150,200,155 199,157,198,158,198,159,196,160,195,160,194,159 e|********* m189,140 l191,139,192,138,193,138,195,137,197,135,199,135,201,133,203,133,204,132,206,131,222,131,223,132,228,132,230,131,232,129,235,129,239,125,241,124,242,122,243,121 243,119,245,117,245,115,246,114,246,113,247,113 e|********* m223,113 l224,112,230,109,232,109,233,108,236,106,237,106,239,105,240,104,242,104,244,102,247,102,247,103,248,103,248,104,249,105,249,108,248,112,247,113,246,117,245,119 245,120,243,121,242,122,240,122,235,117,235,116 e|********* m233,112 l236,112,237,113,237,119,236,120,235,122,232,125,232,124,231,123,230,119,230,107 e|********* m237,30 l259,30 e[/whitepad]

那个东东外观不太好看吧

支持```有没有图片```

支持```有没有图片```

最好能附上照片啊。这样比较清楚