Navigation using acoustic range measurement is one of the most important techneques of underwater robot, becoming a research hotspot.

中文摘要基于水聲測距的導航定位技術(shù)在水下機器人中獲得廣泛應(yīng)用中文字幕日韩国产精品强奸乱伦，并成為現(xiàn)今水下機器人技術(shù)的研究熱點无码操B在线播放。

To begin with, he can quite happily swim below the surface of the water, wearing his equivalent of the aqualung in the shape of an air bubble which he traps beneath his stomach and between his legs, so that he may breathe under water.

首先黄色强奸美女A级片，水蜘蛛帶著一個相當于水肺的東西使其可以在水下自由暢泳天堂欧美成公司。那東西的形狀就像一個水泡韩日精品高肏操穴视频免费，水蜘蛛把其藏在自己的腹部及腿下美女裸体一级作爱视频，以便讓他可以在水下呼吸。

The construction and the principle of the two-dimensional galvanometric scanner laser scanning system are theoretically described.

對二維振鏡激光掃描系統(tǒng)組成和原理進行了理論描述插插插插插爽，討論了在視距范圍內(nèi)采用擴束裝置和振鏡系統(tǒng)對激光束實施可靠控制的方案办公室A片在线观看免费，并在水下光通信系統(tǒng)中有效地完成了對水下和空中運動目標所在區(qū)域的掃描。

The construction and the principle of the two-dimensional galvanometric scanner laser scanning system are theoretically described. The methods to effectively control the laser beam with bunch expanding devices and the galvanometric scanner system in the visible range and finish the scanning of the area of the goal underwater and in the air in the underwater optical communication system.

對二維振鏡激光掃描系統(tǒng)組成和原理進行了理論描述一本热久久sm色国产，討論了在視距范圍內(nèi)采用擴束裝置和振鏡系統(tǒng)對激光束實施可靠控制的方案国产在线观看三级，并在水下光通信系統(tǒng)中有效地完成了對水下和空中運動目標所在區(qū)域的掃描。

The seedlings of Vallisneria natans were also restrained in the control where underwater light intensity was more than 43.3% of natural light intensity, but the seedlings grew well in the water at turbidity of 30NTU where underwater light intensity was more than 7.1%.

在對照水體中日韩精品观看第一页在线观看网站，水下的光強為水面光強的43.3%以上欧美综合色色，苦草幼苗也受到抑制；而在水下光強≥7.1%的30NTU水體中性柔术18性13处交视频，苦草幼苗有較高的光能利用率国产精品一级黄片，幼苗生長較好。

It is shown that the shortcomings of concrete admixed with polyacrylate are basically overcome by substituting polysaccharides for polyacrylate.

而水下不分散混凝土著眼于材料體系本身性質(zhì)的改善日韩国产午夜福利片在线观看，也就是在尚未硬化狀態(tài)下即使受到水的沖刷也不能使材料分散操操操网址，并能在水下形成優(yōu)質(zhì)、均勻的混凝土欧美视频大全。

Usually just their big nostrils appeared for a gulp of air as they foraged on sea grasses or swam slowly to greener underwater pastures.

通常黄色免费a片短视频，當它們在水下尋找海草或者慢慢地游向一些更綠的水下牧草場時，它們長長的鼻孔會伸出水面來換氣欧美亲近乱子伦电影。

The results show that the flow units consist of type A, B, C and D which distribute in sedimentary microfacies of subaqueous distributary channel, mouth bar, crevasse splay, interdistributary bay and subaqueous natural levee, respectively.

研究表明在线h精品，本區(qū)的河流相儲層可以劃分為為A、B色播播影院,噜噜噜噜私人影院、C91精品国产高潮露脸、D 4類流動單元小草AV免费电影在线观看，分別分布在水下分流河道、河口壩在线日韩素人自拍网站免费观看视频、決口扇欧美色色色日、分流間灣和水下天然堤微相中。

Photo Gallery: Underwater Scenes Photographer Emory Kristof has pushed the boundaries of underwater photography over his long career, from pioneering the invention of remotely operated vehicles, high intensity lighting, and robot cameras, to exploring wrecks like the Titanic and shooting deep sea creatures like these fish and floating salps in the Bowie Seamount.

意譯：水下景色圖片美術(shù)館无码午夜视频。攝影師埃默里克里斯托夫已經(jīng)推進水下攝影的界線在他的長期生涯上午夜无码人妻AV大片色欲，從開拓型發(fā)明的遠程地操作交通車，高強度光源国产白嫩白丝护士在线播放，和機器人照相機一级黄色生活视频一区二区，去探測沉船像泰坦尼克號和深海攝影生物像這些魚和浮動的樽海鞘在鮑伊海底山。

Photographer Emory Kristof has pushed the boundaries of underwater photography over his long career, from pioneering the invention of remotely operated vehicles, high intensity lighting, and robot cameras, to exploring wrecks like the Titanic and shooting deep sea creatures like these fish and floating salps in the Bowie Seamount.

意譯：水下景色圖片美術(shù)館日韩s8精品无码久久久久影院。攝影師埃默里克里斯托夫已經(jīng)推進水下攝影的界線在他的長期生涯上黄色另类视频，從開拓型發(fā)明的遠程地操作交通車，高強度光源人人操人人人人人人操人人人人人人操人人，和機器人照相機国产乱子伦一区二区三区，去探測沉船像泰坦尼克號和深海攝影生物像這些魚和浮動的樽海鞘在鮑伊海底山。