A practical english grammar - Vyssaja skola 1978

Chapter 15 - Gerunds in noun compounds
Sound symbols

There are many combinations of ing-form and following noun in which the ing-form is not a present participle but a gerund, and the resulting combination is a compound, always stressed on the first word. Notice the difference in these expressions:

a hunting dog (a dog that is hunting)

a hunting dog (a dog for hunting)

a dancing girl (a girl who is dancing)

a dancing girl (a girl whose profession is dancing)

Some other compounds consisting of gerund and noun:

swimming pool grinding tool sitting room

carving knife  punching bag polishing cloth

sewing machine boxing ring shaving brush

cooking pot  dining room knitting needle

Each of the foregoing compounds is always stressed on the first word.