Strictly English: The correct way to write ... and why it matters

Right Angle Gear Motor, 120W 30K Ratio Variable Speed Motor 90 Degree Output 110V Wiring Industrial Automation Equipment Adjustable Speed Reducer for Conveyor Machinery Workshop Use

Bemonoc High Torque 6W AC Motor 110V 50/60HZ Low Speed 7.5Rpm, Small Electric Reducer Motor with AC Speed Controller CW CCW, Bracket for Printing Industry

Lexar Industrial RV050 Worm Gear 25:1 Coupled Input Speed Reducer

Lexar Industrial MRV075 Worm Gear 50:1 140TC Speed Reducer

Lexar Industrial MRV090 Worm Gear 30:1 140TC Speed Reducer

Lexar Industrial MRV063 Worm Gear 40:1 56C Speed Reducer

Lexar Industrial MRV040 Worm Gear 80:1 56C Speed Reducer

Lexar Industrial MRV040 Worm Gear 30:1 56C Speed Reducer