US PATENT SUBCLASS 165 / DIG 78
.~ Linearly operated scraper

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

DIG 76  DD  WITH SCRAPER FOR REMOVING PRODUCT FROM HEAT TRANSFER SURFACE {4}
DIG 78.~ Linearly operated scraper {1}
DIG 79  DD  .~.~> Reciprocated linearly