Creditee
发表于 2025-3-23 11:22:01
http://reply.papertrans.cn/19/1811/181003/181003_11.png
带伤害
发表于 2025-3-23 15:17:33
http://reply.papertrans.cn/19/1811/181003/181003_12.png
Lobotomy
发表于 2025-3-23 19:44:07
http://reply.papertrans.cn/19/1811/181003/181003_13.png
天空
发表于 2025-3-24 00:49:39
http://reply.papertrans.cn/19/1811/181003/181003_14.png
常到
发表于 2025-3-24 06:10:20
Hematopoietic Stem Cell DevelopmentAll installations, both new and temporary, require thorough testing before being commissioned into service. This also applies to additions and alterations. Although safety is of primary importance it is also essential to check whether appliances and equipment are operating correctly.
Nonthreatening
发表于 2025-3-24 08:46:42
Simon N. Robinson,Ronald P. van OsElectrical installations may be considered as a practical application of electrical engineering. Supplies for the installations come from distribution networks connected to National Grid lines, which in turn are fed from highly efficient power stations — these are administered by the Central Electricity Generating Board (C.E.G.B.).
猛然一拉
发表于 2025-3-24 11:34:00
http://reply.papertrans.cn/19/1811/181003/181003_17.png
faultfinder
发表于 2025-3-24 18:30:00
http://reply.papertrans.cn/19/1811/181003/181003_18.png
责问
发表于 2025-3-24 19:55:13
Trunking Work,Increases in the cost of land force an inevitable trend towards the construction of tower blocks for office and living accommodation, each of the separate installations being fed off rising mains. Standard practice is to support and mechanically protect the risers by a sheet steel trunking; the conductors are bare copper or aluminium bars or rods.
FLEET
发表于 2025-3-25 00:27:02
Lighting,Lighting was one of the first applications of electricity and still remains of very great importance. Despite the many efficient electric light sources available, the ordinary tungsten filament lamp has an extremely wide application. Its many features merit close examination by the student.