2. In apparatus for use in erecting a circular wall, a pole adapted to be arranged in upright position in the axis of said wall, a U-shaped yoke... 被引量: 0发表: 0年 Self-erecting structure for rod-shaped member and method of producing rod-shaped member having self-erecting structure...
A vertical pole stands at a point A on the boundary of a circular park of radius 2 km and subtends an angleat another point B on the boundary. If the chord AB subtends the same angleat the centre of the park, the height of the pole is ...
Stand for supporting a pole-shaped element (1), in particular a Christmas tree, essentially vertically, comprising an annular base element (2) to which three stays (3,4,5) are hingedly fixed. Each stay is provided with two legs (3a,3b;4a,4b;5a,5b) forming an angle with each other,...
The pole’s base would be at a determinate spot on the ground. The amount of ground towards the pole’s base is a measure of its distance. Convert “amount of ground” to angle of elevation with respect to a horizon and Alhazen would be modern. Surface perception was first mentioned in...
A member of Project Owl's test crew in Puerto Rico attaches a solar-powered DuckLink to a rooftop pole. Project Owl "There was no way of contacting your loved ones for around the first few weeks to the first month," he remembers. "And with the streets blocked becaus...
which excites a Rossby wave train propagating eastward and poleward. The barotropic atmospheric circulation anomaly generates a negative North Atlantic Oscillation-like response and suppresses westerly winds south of Greenland, which hinders the transformation of upper ocean waters in the Labrador Sea via...
A tower of height h stands at a point O on the ground. Two poles of height a and b stand at the points A and B respectively such that O lies on the line joining A and B. If the angle of elevation of the top of the tower at the foot of one pole is ame as at the top of...
Many of the hight voltage electricity pole stands in a long line on the green rice fields.Power lines were tied together far as the eye can see.,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等
According to Lewis’ journal , the evening of July 19, 1805, Lewis and his team encountered walls of limestone 1200′ high lining both sides of the river, with water so deep they had to row their boats rather than pole them and towing from shore was clearly not an option. As they appr...
Built primarily out of wood and featuring a tin roof, the cheap hotel is attached to a bridge that rises up among the area. It is held in place by several steel wires connected to the cliff and supported by a long wooden pole also placed against the cliff. It stands about 20 meters ...