*Vertices 4
1 "石油钻采工艺" 0.0 0.0 0.0 x_fact 4.087193 y_fact 24.523161
2 "石油机械" 0.0 0.0 0.0 x_fact 8.991826 y_fact 46.049046
3 "油气田地面工程" 0.0 0.0 0.0 x_fact 0.817439 y_fact 1.362398
4 "石油矿场机械" 0.0 0.0 0.0 x_fact 17.166213 y_fact 28.065395
*Matrix 
0.000000 0.212971 0.000000 0.297410 
0.212971 0.000000 0.745016 0.828695 
0.000000 0.745016 0.000000 0.746816 
0.297410 0.828695 0.746816 0.000000