[Reptider]

Hello!
I create physical surfaces for using them in OpenFOAM later in .geo thanks to:

Merge "fisrt.stl";
Surface Loop(1) = {1};  // first surface*
Physical Surface("firstWall") = {1};

Merge "second.stl";
Surface Loop(2) = {2};  // second surface*
Physical Surface("secondWall") = {2};

Volume(1) = {1,2};
Physical Volume("Volume") = {1};

I can create a stl file using Export -> ASCII + per physical surfaces and receive nessecary results in stl file like:

solid firstWall
... 
endsolid firstWall
solid secondWall
...
endsolid secondWall

However, when I use in the terminal this command: "gmsh -2 name.geo -o name.stl:, I get a single solid. How can I do this operation using onlu the terminal?
Thanks!