日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

US EUROPE AFRICA ASIA 中文
World / Victory parade

Space technology unfurled in red flag over Tian'anmen

(Xinhua) Updated: 2015-09-04 13:09

Space technology unfurled in red flag over Tian'anmen

Aircraft attend a parade in Beijing,?Sept 3, 2015. [Photo/CFP]

BEIJING - Two huge red flags flying at 180 km per hour over Beijing's Tian'anmen Square Thursday opened China's grand parade to commemorate the 70th anniversary of the end of World War Two.

Thousands of visitors, including 30 foreign leaders on the Tian'anmen Rostrum, applauded when the 9-meter-long national flag and 7.5-meter-long Chinese army flag hanging from two helicopters flew overhead.

But the spectacle would have been impossible without China's advanced space technology.

"The flag would have been torn into pieces at such a speed," said Jiang Changhong, an expert with Beijing Institute of Space Mechanics and Electricity, "as it had to withstand winds as powerful as a typhoon."

After numerous experiments, scientists discovered that they could do it using same special material used to make the Shenzhou spacecraft parachute.

"The special material enabled the parachute to bear up to 3 tonnes and be folded into a big suitcase." Jiang said it was also light, easily carried and durable.

Scientists also used a special paint that made the flag brighter and more waterproof to prevent fading in the elements.

Each flag was made up of seven pieces, requiring master sewing skills.

And while the cost was high, scientists said, the quality and peace of mind were priceless.

Trudeau visits Sina Weibo
May gets little gasp as EU extends deadline for sufficient progress in Brexit talks
Ethiopian FM urges strengthened Ethiopia-China ties
Yemen's ex-president Saleh, relatives killed by Houthis
Most Popular
Hot Topics

...
主站蜘蛛池模板: 午夜爱爱爱爱爽爽爽网站免费 | 五月婷婷丁香在线观看 | 麻豆国产精品va在线观看不卡 | 狠狠操在线观看 | 亚洲精品麻豆 | 日本欧美中文字幕人在线 | 国产精品亚洲成在人线 | 亚洲自拍偷拍色图 | 国产精品色 | 91电影| 制服丝袜成人动漫 | 日韩成人免费av | 亚洲欧美日韩一级特黄在线 | 欧美一a一片一级一片 | av一二三区 | 欧美日韩不卡合集视频 | 九色 在线 | 国产高清在线91福利 | 精品国产欧美一区二区 | 欧美久久天天综合香蕉伊 | 中文精品久久 | 欧美黑人ⅹxxx片 | 91精品成人免费国产 | 日韩精品第一页 | 五月天欧美激情午夜情 | 欧美激情欧美激情在线五月 | 香蕉久久一区二区不卡无毒影院 | 黄网站免费在线观看 | 一区二区三区国产 | 天天操婷婷 | 色婷婷视频在线观看 | 国产高清无专砖区2021 | 国产色婷婷视频在线观看 | 99色吧| 中文字幕一区二区三 | 一级视频在线播放 | 欧美日韩高清一区 | 麻豆精品一区二区 | 91精品久久久久久久久网影视 | 日本一区免费在线观看 | 成人福利在线免费观看 |