of the button F, the controlling factor In the mixture used In sheet special lamp Is readily removable, so that It may be asphalt paving, it Is very necessary to make this ce- the needle, weighted by the parts C, SS, and W, may sterilized after each use. Moreover, every part of the be brought Into… … The difference In position of the count of measurement efforts in rack will, therefore, give the Side view of the improved penetrometer. Pendnlnm and indicator dial a very different field of activity. amount which the needle has The sheet asphalt pavements (Concluded on page 8^3.) TESTING BITUMENS…
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