sergey.alexandrov,
Very high tech information:
A male part of something is the part that fits inside of another part. A female part is the the part that another part fits into.
A M/F hose swivel would be male on one end and female on the other end.
2012년 2월 9일
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Excellent question. I teach in English in engineering. None of us would have a clue, but male/female makes perfect sense.