I believe they're called anti-nodes. The points of the wave where the amplitude changes the most. Since they reverse, I don't think there's a different name for the high spot â¦ or low spot.
A jointer may also be used to flatten the face of a board, in which case the sole focus is to produce a flat surface on the face of the board and the fence is not used. This procedure is often performed prior to edge jointing so that the board has a flat reference face for subsequent operations. jointer that is used for rebating has the outside ends of its blades also sharpened and set with a small clearance from the cutter head. A jointer cannot be used to create a board of even thickness along its length.
Rubber gaskets used in plumbing are sometimes called washers. Different types of washers have different uses. Star washers are helpful when the material is soft enough to allow the washer to adhere. Flat washers are used to disburse the compression of the nut or bolt smoothly. This lessens the possibility of damage and offers a flat space for the nut or bolt to stay, meaning it will be more likely to stay in one place.