gear grinding
61Chainsaw — For other uses, see Chainsaw (disambiguation). An arborist using a chainsaw to fell a eucalyptus tree A chainsaw (or chain saw) is a portable mechanical saw, powered by electricity, compressed air, hydraulic power, or most common …
62Wrench — For other uses, see Wrench (disambiguation). A set of chrome vanadium metric wrenches, open at one end, box/ring at the other. This type is commonly known as a combination wrench. A wrench or spanner is a tool used to provide grip and mechanical… …
63Millwright — A millwright is a craftsman or tradesman engaged with the construction and maintenance of machinery. Early millwrights were specialist carpenters who erected machines used in agriculture, food processing and processing lumber and paper. In the… …
64Caliper — For other uses, see Caliper (disambiguation). A vernier caliper …
65Mamod — Type Private Industry Toys Founded 1937 Founder(s) Geoffrey Malins …
66Heelys — are a brand of Roller shoes (marketed by Heelys, Inc.) that have one or more wheels embedded in each sole, similar to inline skates. Thus, the wearer can walk, run, or, by shifting their weight to their heels, roll. Braking can be achieved by… …
67Diamond blade — A close up of a diamond blade, showing worn metal behind the diamonds on the blade. A diamond blade is a saw blade which has diamonds fixed on the blade s base to use the diamonds to cut hard or abrasive materials. There are many types of diamond …
68Song Yingxing — (Traditional Chinese:宋應星; Simplified Chinese:宋应星; Wade Giles: Sung Ying Hsing; 1587 1666 AD) was a Chinese scientist and encyclopedist who lived during the late Ming Dynasty (1368 1644). He was the author of an encyclopedia that covered a wide… …
69papermaking — [pā′pər māk΄iŋ] n. the making of paper papermaker n. * * * pa·per·mak·ing (pāʹpər mā kĭng) n. The process or craft of making paper. paʹper·mak er n. * * * Introduction formation of a matted or felted sheet, usually of cellulose fibres,… …
70waterwheel — /waw teuhr hweel , weel , wot euhr /, n. 1. a wheel or turbine turned by the weight or momentum of water and used to operate machinery. 2. a wheel with buckets for raising or drawing water, as a noria. 3. the paddle wheel of a steamboat. Also,… …
