Recreation, Volum 56National Recreation Association, 1963 |
Des de l'interior del llibre
Resultats 1 - 3 de 59.
Pàgina 343
... pool , piping and equipment has a capacity of 150,000 gallons of water . The pool is filled with water from two fill lines located under the diving boards at the deep end of the pool . These fill lines have a physical air break above ...
... pool , piping and equipment has a capacity of 150,000 gallons of water . The pool is filled with water from two fill lines located under the diving boards at the deep end of the pool . These fill lines have a physical air break above ...
Pàgina 418
... pool HE " HEART " of any swimming pool , small or large , is its filtration system . Pools , like many human beings . have or may have " heart trouble . " A good pool- filter operator is the MD of the boiler room . He must be sure ...
... pool HE " HEART " of any swimming pool , small or large , is its filtration system . Pools , like many human beings . have or may have " heart trouble . " A good pool- filter operator is the MD of the boiler room . He must be sure ...
Pàgina 420
... pool vol- ume through the filters in not more than three hours for public pools and not more than twelve hours for ... pool has two or more filters . W HAT is meant by " pool turnover " ? Every time an amount of water equal to the total ...
... pool vol- ume through the filters in not more than three hours for public pools and not more than twelve hours for ... pool has two or more filters . W HAT is meant by " pool turnover " ? Every time an amount of water equal to the total ...
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