23 HAND SCRAPERS, SCRAPER WINCHES WITH AND WITHOUT RUNNING GEAR, JIB SCRAPING DEVICES; FEEDERS; CONCRETE MIXERS; CEMENT WORM CONVEYORS; STATIONARY AND MOVABLE CONCRETE PREPARATION DEVICES; CONTROL AND REGULATING DEVICES FOR CONCRETE PREPARATION MACHINES AND PARTS THEREOF; COMBINATIONS AND PARTS OF THE AFOREMENTIONED GOODS