One of the difficulties of dealing with the United States is that the old non-metric measurements are still used in some industries. Here are some common abbreviations printed in bold type. What do they stand for？

1. 1 h.p.=746 watts

2. 1 U.S.gall.=3.785 litres[but 1 British （imperial） gall.=4.456 litres]

3. 1 yd.=0.9144 metres

4. 1 yd.=3 ft.

5. 1 in.=2.54 centimetres

6. 1 oz.=28.35 grams

7. 1 cwt.=45.359 kilograms

8. 2.205 lbs=1 kilogram

9. and， though not really a measurement， 1 doz. boxes=12 boxes

1. horsepower

2. gallon

3. yard

4. feet

5. inch

6. ounce

7. hundredweight

8. pounds

9. donzen