An example is L8TM3 - "8" being the wire thickness, "TM" for Trench Mesh and "3" for three wires. All Trench Meshes have predetermined spacings and are typically 6 metres in length.
PC - IE: right click and "save target as...", Netscape: right click and "save link as..."
Mac - IE: Option/Click and "save target as...", Netscape: Option/Click and "save link as..."