资讯

Unrestrained spider dragline 'super-contracts' when it is wetted, causing its length to shrink by about half and its diameter to almost double1,2. Here we measure the supercontraction stresses ...
Dragline silk combines toughness and strength to an extraordinary degree. A dragline strand is several times stronger than steel, on a weight-for-weight basis, but a spider's dragline is only ...
The dragline, which has a working weight of 6950 tonnes, has a base diameter of 24.4 metres and a revolving frame that is 34 metres wide by 38 metres long.
A History of the World is a partnership between the BBC and the British Museum that focuses on world history, involving collaborations between teams across the BBC, and schools, museums and ...
Sometimes a lady spider has to show off the goods. New research shows that female wolf spiders increase their dragline silk advertisements to get otherwise uninterested males’ attention.
Sep. 30—SCAMMON, Kan. — A walking dragline idled in Cherokee County for decades is one step closer to becoming a roadside attraction in Southeast Kansas. Workers with Tilton and Sons House ...
A History of the World is a partnership between the BBC and the British Museum that focuses on world history, involving collaborations between teams across the BBC, and schools, museums and ...
BEULAH - A gigantic dragline working a coal seam at Dakota Westmoreland Mine near Beulah tipped precariously forward when ground beneath it crumbled away. The incident happened about 5 a.m. Sunday ...
The dragline forms part of a large collection of assets being made available by De Beers at an upcoming final clearance sale at their premises in Namaqualand.
The Page 618 dragline weighs a little less than 500 tons and is thought to be one of only two of its kind still in existence. It is to be moved to a display location at Franklin later this year.