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{{Short description|Variety of environments that people may dive in}} ...anchor|penetration diving}} environment is where the diver enters a space from which there is no direct, purely vertical ascent to the safety of breathabl ...

[[Image:Celtel shop uganda.jpg|thumb|right|250px|Signs and ads from [[Celtel]] and other mobile telephony operators are ubiquitous in rural [[A ...g |thumb|right|250px|[[LTE (telecommunications)|LTE]] [[cell towers]] in [[Pretoria]], [[South Africa]]]] ...

...ls the world in many ways, the types of implemented technology are derived from a variety of sources. Thus, in theatre, for example, entertainment technol ...to people's spare time. Traditionally, entertainment technology is derived from theatrical [[stagecraft]], and stagecraft is an important subset of the dis ...

...only two of the cities that received Flyover that year had over a million people.<ref name="auto2"/><ref>{{Cite web|last=Lovejoy|first=Ben|url=https://9to5m ...tions – mostly big cities, landmarks and some national parks – can be seen from a birds-eye perspective. The three-dimensional views are photo-realistic, a ...

| birth_place = [[Pretoria]], [[Transvaal (province)|Transvaal]], South Africa<!-- DO NOT LINK, see [[ ...es Index]]'', and $210&nbsp;billion according to ''[[Forbes]]'', primarily from his ownership stakes in Tesla and SpaceX.<ref>{{cite news |title=Bloomberg ...

The primary function of diving weights is as ballast, to prevent the diver from floating at times when he or she wishes to remain at depth. ...r due to low average density and large size. This is usually the case with people with a large proportion of body fat. As the diver is nearly neutral, most b ...

...r recycles breathing gas other than ambient air in a space used by several people is usually referred to as being part of a [[life-support system]], and a li ...latory driving force: the breathing effort of the user, or mechanical work from an external source, ...