11. Spray angles are typically measured using optical or mechanical methods . 12. Which can be easily rectified using the mechanical method . 13. The airships carried no mechanical method of detecting submarines. 14. Mechanical methods of control involve cutting off crowns from roots, usually just below ground level.15. Ice-water separation is another mechanical method of isolating trichomes. 16. Weeds were controlled in the organic plot with cover crops, mulching and mechanical methods , including burning. 17. Sawflies can be controlled through the use of insecticides, natural predators and parasites, or mechanical methods . 18. Plaster is easily removed through mechanical methods such as chiselling and chipping away with sharp implements. 19. This can be done by purely mechanical methods . 20. Steam turbines, or even wind turbines driven by rising columns of heated air are mechanical methods .
