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Pencil — This article is about the handwriting instrument. For other uses, see Pencil (disambiguation). HB graphite pencils A pencil is a … Wikipedia
Wheel speed sensor — [ head unit.] Wheel speed sensors or vehicle speed sensors (VSS) are sender devices used for reading the speed of the vehicle s wheel rotation. It usually consists of a toothed ring and pickup. Special purpose speed sensors Rotary speed sensors… … Wikipedia
Fireproofing — Fireproof redirects here. For the album, see Fireproof (album). For the 2008 film, see Fireproof (2008 film). Fireproofing, a passive fire protection measure, refers to the act of making materials or structures more resistant to fire, or to those … Wikipedia
Tracing paper — is a type of translucent paper. It is made by immersing unsized and unloaded paper of good quality in sulfuric acid for a few seconds. The acid converts some of the cellulose into amyloid form having a gelatinous and impermeable character. When… … Wikipedia
Paper — For other uses, see Paper (disambiguation). A stack of copy paper Paper is a thin material mainly used for wr … Wikipedia