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Wise penstock, Pacific Gas 
<V Electric Co., Calif. 
Searsburg, Vt., penstock, 
New England Co. Power 
system. Continuous-stave 
fir pipe. Inside slightly 
slimed. Alignment sinu- 
ous. Contains 7 steel 
bends with central angles 
from 40 to 90 degrees. Pipe 
2 years old. 
Madison River penstock, 
Montana Power Co. I n- 
treated stave pipe, 17 years 
Old. 
Montana Power Co. This 
penstock paralleled No. 61 
above. 
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