name category accountants acoustical contractors acupuncture advertising agricultural air cargo air conditioning airlines amusement machines amusement parks antiques apartments appliances household architects art galleries artificial flowers arts and crafts associations automobile badges and medals bakers...
name category accountants acoustical contractors acupuncture advertising agricultural air cargo air conditioning airlines amusement machines amusement parks antiques apartments appliances household architects art galleries artificial flowers arts and crafts associations automobile badges and medals bakers...
name category accountants acoustical contractors acupuncture advertising agricultural air cargo air conditioning airlines amusement machines amusement parks antiques apartments appliances household architects art galleries artificial flowers arts and crafts associations automobile badges and medals bakers...
answer reward question has expired also arc welding submit other answers - - : : first of all, i cant believe u're asking this here. u're a very lasy mechanical eng. student samuel olad. so u want people on the forum to do the home assignment for u?...
submit other answers - - : : okay theres two basic types of welding helmet....ones with an automatic shade and ones without ...both are fine if you use them correctly .if it 's for his job or he is going to do a lot of welding then a good quality auto helmet is the go if it is a hobby and he doesn't...
submit other answers - - : : these are just a few: * calcium carbonate (caco ) used in manufacturing cement and mortar, lime, limestone (usually used in the steel industry); aids in production in the glass industry, also has chemical and optical uses as mineral specimens in toothpastes for example. *...
submit other answers - - : : tic = titanium carbide, an extremely hard (mohs - ) refractory ceramic material, similar to tungsten carbide. it is commercially used in tool bits cutting tools. it has the appearance of black powder with nacl-type face centered cubic crystal structure. it is mainly used...
submit other answers - - : : as others have said diamond is the hardest natural material and diamond nanorods are the hardest period but if you are looking for a metal it gets more complicated. modern high speed steels can get above a rockwell c (if you are going to try to correct me make sure to check...