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<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 2,945
<SECURITIES> 584
<RECEIVABLES> 38,417
<ALLOWANCES> (605)
<INVENTORY> 38,640
<CURRENT-ASSETS> 83,927
<PP&E> 257,185
<DEPRECIATION> (169,071)
<TOTAL-ASSETS> 233,591
<CURRENT-LIABILITIES> 45,750
<BONDS> 7,975
0
0
<COMMON> 6,892
<OTHER-SE> 144,765
<TOTAL-LIABILITY-AND-EQUITY> 233,591
<SALES> 122,775
<TOTAL-REVENUES> 122,775
<CGS> 102,338
<TOTAL-COSTS> 118,767
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 631
<INCOME-PRETAX> 3,907
<INCOME-TAX> 1,605
<INCOME-CONTINUING> 2,302
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 2,302
<EPS-BASIC> 0.37
<EPS-DILUTED> 0.37
</TABLE>
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