curve-cutting machine
21Tap and die — Not to be confused with Tool and die. Taps and dies are cutting tools used to create screw threads, which is called threading. A tap is used to cut the female portion of the mating pair (e.g., a nut). A die is used to cut the male portion of the… …
22number game — Introduction any of various puzzles and games that involve aspects of mathematics. Mathematical recreations comprise puzzles and games that vary from naive amusements to sophisticated problems, some of which have never been solved.… …
23Japanese sword — Traditional Samurai swords and fittings A Japanese sword, or nihontō (日本刀 or にほんとう, lit. Japanese sword …
24Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …
25Lawn mower — A typical modern gasoline powered push mower. A riding mower or ride on …
26Field hockey stick — In Field hockey, each player carries a stick and cannot take part in the game without it. The stick is usually between 36 and 38 long (but this is not defined or restricted)and traditionally made of wood but now almost all the more expensive… …
27Saw — For other uses, see Saw (disambiguation). Saw A crosscut hand saw about 620 mm (24 inches) long Classification Cutting Types Hand saw Back saw Bow saw Circular saw …
28Diamond tool — A close up of the segment of a diamond saw blade A diamond tool is a cutting tool with diamond grains fixed on the functional parts of the tool via a bonding material or another method.[1] As diamond is a superhard material, diamond tools have… …
29Diamond 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 …
30building construction — Techniques and industry involved in the assembly and erection of structures. Early humans built primarily for shelter, using simple methods. Building materials came from the land, and fabrication was dictated by the limits of the materials and… …
