Stocks of two Long Island-based companies were  among the 10 biggest volume gainers on Nasdaq at the close of trading yesterday.:
 
Shares of defense and industrial electronics manufacturer Hauppauge-based Orbit International Corp. rose 2 percent to $3.
 
Shares of Melville-based P&F Industries Inc., which manufactures tools and hardware, fell 3.6 percent to $1.85.

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