practical skills

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Across
  1. 3. the system of pipes, tanks, and fittings
  2. 4. a measure in electrical pressure measured by watts
  3. 6. an allowable amount of variation of a specified quantity, especially in the dimensions of a machine or part.
  4. 8. lacking strength or ability to move
  5. 9. stack the pipe that takes all the waste water from the upstairs plumbing system of a building
  6. 11. any of various devices, as a snap or hook and eye, for holdingtogether two objects
Down
  1. 1. system the decimal measuring system based on the meter, liter, and gram
  2. 2. a conducting wire or thread with a high melting point
  3. 3. to be assembled at the warehouse
  4. 5. a rigid bar resting on a pivot, used to help move a heavy or firmly fixed loader
  5. 7. a measure of 1,000 watts of electrical power
  6. 10. and axle a simple lifting machine consisting of a rope that unwinds from a wheel