Telegraph pole

Australian silky oak is native to the fifth continent, but it is also grown in Africa, Sri Lanka, India, and the United States. Flooring, furniture, and plywood are the main uses, but the tree is also required for telegraph poles and as a shade tree. Grevillea poisoning is a common term for occupational dermatitis that deve-... 

Some cracks have become the side edge of the landslide after penetrating with holes. The trees and telegraph poles on the slopes tilted, and tensile cracks appeared on houses. The angle of telegraph pole in the east of the slope where the elevation is about 1680 m and the tilt angel is about 80° (see figure 5). 

Spot tests can be applied to investigate the nature of the chemicals used in the preservation of timber (telegraph poles, powerline towers, railway ties, etc.). The mineral salts most commonly used are mercuric chloride, copper sulfate, zinc chloride, sodium fluoride. 

Figure 6.26 A telegraph pole at the edge of the carriageway at a tie-ln point...

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