Electric Poles on the blue sky / Telephone Pole / Power Lines,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,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银行、
Power lines connected to a telephone pole with a bright blue sky.,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,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银
THE USE OF CHEMICALLY TREATED WOODEN POLES FOR TELEPHONE AND POWER TRANSMISSION LINES IN SOUTH AFRICAExpts. in chem. treatment of poles to prevent decay and insect attack, begun in 1924, have not yet shown the failure of a single properly treated pole. The poles used are mostly from ...
telephone exchange- a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication central,exchange centrex- (CENTRal EXchange) a kind of telephone exchange patchboard,plugboard,switchboard- telephone central where circuits are completed...
Type:6m-12m electric poles;Model Number:electric pole;Design:Customiszed;Surface treatment:hot dip galvanization;Dimenstion torlance:+- 2%;Standard:ISO;Welding standard:AWS D 1.1;Gavanization standard:ASTM A 123;Warranty:15 years;Manufactury capacity:30
sound waves at a distant point, used primarily for voice communication; it consists essentially of a telephone transmitter and receiver at each station, interconnecting wires or radio transmission systems, signaling devices, a central power supply, and switching facilities. Also known as telephone ...
The solution was to place an antenna on top of a large utility pole and locally share the signal. CATV, as we now know it, was created when the signal from one master antenna was distributed over a large area using coaxial cable and amplifiers. The key innovations in cable TV are ...
;CONSTITUTION: A main pole 10 for stringing a first cable 1 is provided, and a first brace 11 for reinforcing against a load due to a power line is diagonally installed between the main pole 10 and the ground GND for a telephone pole. When stringing a second cable 2 to another place ...
Open-wire telecommunications were developed in the 19th and early 20th centurieswithout any consideration of the deleterious effects of power lines; compat... M Paul 被引量: 1发表: 1998年 ANCHORING OF TELEPHONE WIRES This invention relates to the rigging of wires, particularly telephone wires, bet...
The phone was in the house when we moved in. Maybe the landlady stole it or bought it, or who knows. Once a Soviet republic, this is a country of many possibilities. I glance out the window and look at the telephone pole. It looks a bit scary. ...