Materials Vibration Brakes 3 Clutches (Machinery) 3 Machine design 3 Screws 3 Cams 2 更多 ... Chains 2 Couplings 2 Flywheels 2 Gearing 2 Lubrication and lubricants 2 Mechanical wear 2 Riveted joints 2 Roller bearings 2 Shafting 2 Springs (Mechanism) 2 Strains and stresses 2 Tolerance (Engineering) 2 Welded joints 2 Air 1 Airborne infection 1 Bearings (Machinery) 1 Belt drives 1 Belts and belting 1 Bolted joints 1 Chemical plants 1 Chemical vapor deposition 1 Clean rooms 1 Cleaning 1 少 ...