Thanks, It is very educational....3 ]4 X/ @1 i/ R$ b Z1 K9 Y
here is a link you can read the drawings 8 I1 E5 t- H: [! i1 E0 o" p 2 x6 s( c" u0 b0 {3 a @( v7 Qhttp://www.dfg.cn/gb/zjjy/7/zjjy-7-1.htm ; {! i+ \ t# o4 \2 a1 L" e1 a+ O5 T; ]) V$ r( Z
[ 本帖最后由 rockylily 于 2006-12-21 13:52 编辑 ]