this.techType = TechConstants.T_IS_LEVEL_2;
this.techLevel = TechConstants.T_IS_LEVEL_2;
    public RocketLauncherType( int size, Vector valid_ammo,                    AmmoType ammo_type ) {        super(size, valid_ammo);    this.def_ammo_type = ammo_type;    this.def_ammo_name = ammo_type.getInternalName();    this.techType = TechConstants.T_IS_LEVEL_2;    switch (size) {    case 10:        this.tonnage = 0.5f;        this.criticals = 1;        this.bv = 18;        break;    case 15:        this.tonnage = 1.0f;        this.criticals = 2;        this.bv = 23;        break;    case 20:        this.tonnage = 1.5f;        this.criticals = 3;        this.bv = 24;        break;    }    }