hold-down mechanism
121Insect wing — Original veins and wing posture of a dragonfly. Hoverflies hovering to mate …
122Di-Gata Defenders — Logo Format Animated television series (Action/Adventure/Science Fiction[1]/Fantasy) …
123Crossbow — This article is about the weapon. For other uses, see Crossbow (disambiguation). Sketch by Leonardo da Vinci, c. 1500 A crossbow is a weapon consisting of a bow mounted on a stock that shoots projectiles, often called bolts or quarrels. The… …
124Timpani — Infobox Instrument name=Timpani names=Kettle drum, Timp classification= *Percussion instrument *Membranophone range= related= *Kus *Naqareh *NakerTimpani (also known colloquially as kettledrums or kettle drums) are musical instruments in the… …
125Method of analytic tableaux — A graphical representation of a partially built propositional tableau In proof theory, the semantic tableau (or truth tree) is a decision procedure for sentential and related logics, and a proof procedure for formulas of first order logic. The… …
126Fictional military aircraft — are imagined aircraft which are used in fiction, in its various media, but do not exist in the real world. These aircraft may be conjectured variants of real world aircraft or they may be completely fabricated by the author. Contents 1 Fictional… …
127Disasters — ▪ 2009 Introduction Aviation January 23, Poland. A Spanish built CASA transport plane carrying members of the Polish air force home from a conference on flight safety in Warsaw crashes near the town of Miroslawiec; all 20 aboard are killed …
128oxidation–reduction reaction — ▪ chemical reaction Introduction also called redox reaction any chemical reaction in which the oxidation number of a participating chemical species changes. The term covers a large and diverse body of processes. Many oxidation– reduction… …
