Benjamin, Charles H[enry], 1856- [from old catalog] · New York, H. Holt and company · leaf 112
e two sur-faces is usually 90 deg. butmay be more in heavy ma-chines. The grooves g, g areintended to hold the oil inplace; oiling is sometimeseffected by small rolls recessed into the lower pieceand held against the platen by springs. The principal advantageof this form of way is itsability to… … Fig. 26.
Machine design
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