IMPROVED CAR COUPLING. DILLON'S HALTER CHAIN AND TRACE COUPLING. HEAVENER'S IMPROVED CAR COUPLING THE COLORADO POTATO-BEETLE IN EUROPEGERMAN THOROUGHNESS. IMPROVED SASH BALANCE., scientific american, 1877-09-29
IMPROVED CAR COUPLING. DILLON'S HALTER CHAIN AND TRACE COUPLING. HEAVENER'S IMPROVED CAR COUPLING THE COLORADO POTATO-BEETLE IN EUROPEGERMAN THOROUGHNESS. IMPROVED SASH BALANCE., scientific american, 1877-09-29
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