major arc 中文意思是什麼
major arc
解釋
優弧-
The keys to the families, genera and species of hepaticae and anthocerotae in hebei are worked out, and the dissected graphs are pictured. moreover, the chinese name, science name, major reference literatures, collect locations, collector and number of specimen, as well as geographical elements and distribution of every species are narrated explicitly. in the hepaticae - flora of hebei, grimaldiaceae, porellaceae and frullaniuccae arc regarded as dominant, showing obvious temperate - zone character and distinct torrid - zone nature, raising the tropic origion theory of china botany - flora which brought forward by professor z. y. wu
同時，根據標本和資料編制了河北省苔類植物科、屬、種檢索表，詳細記述了每種的中文名、學名、主要參考文獻考證、標本採集地、採集人和標本號，在河北省和中國各省區及世界范圍的地理分佈等，描述了每一種與其相近似種的主要區別點和識別特徵，並根據標本和文獻對其中54種做了顯微繪圖。 -
Arable lands arc few and limited ; with but slight exceptions the prospect is a broad rich mass of grass and trees, mantling minor hills and dales within the major
這兒的耕地很少，面積不大這兒的景物除了很少的例外，只見那些廣闊的生長茂盛的大片草地和樹木覆蓋著大山中間的山巒和小谷。 -
The major purposes of the study arc to investigate the cognition of travel agents toward travel risks in mainland china, and to examine whether there exist significant differences in individual travel risk variables and common factors between different characteristics of travel agents
摘要本研究的主要目的在於探討旅行業對大陸旅行風險的認知，並檢驗不同屬性的旅行業者對各旅行風險變項及共同因子是否具有顯著的差異。 -
Based on the geological, stratigraphic and geochemical characteristics of the ophiolitic melange, island - arc and rift volcanic rocks from the jinshajiang zone, an archipelagic tectonic model with multi - rift and multi - subduction is proposed to explain the evolution of jinshajiang paleo - tethys. the ophiolitic melanges of the jinshajiang zone are mainly outcropped at baimangxueshan, tongduo, gongka, dongzhulin and jiyidu in the deqin county. the geochemistry of major and trace elements of the jinshajiang ophiolite shows its geochemical characteristics are similar to those of the more and island - arc volcanic rocks, but different from those of the typical n - mopjb
金沙江蛇綠混雜巖主要分佈在德欽縣的白茫雪山、通多、共卡、東竹林和吉義獨地區，主量和微量元素地球化學特徵研究表明，金沙江蛇綠巖不具有典型n - morb的地球化學特徵，而具有介於morb和島弧之間的地球化學特徵，暗示它並非形成於寬闊的大洋環境，不是古特提斯在滇西北地區的主縫合帶，可能是古特提斯多島洋體系中的一個弧后盆地。 -
In the fifth section, we deal with general singular series, by which we get an estimate of 5 ^ r in section 6, we complete the estimation for the major arc integrals /
在第五節，通過對廣義奇異級數的處理得到_ 1 ，的一個估計。第六節，我們完成對的估計，得到了一個比較大的下界。 -
Arc welding technologies in japan have been advanced steadily since the time when an application of covered electrodes was first examined in the shipbuilding industry about 90 years ago. the history of the arc welding technology has always been the history of the pursuit of higher " efficiency and speed " of welding processes welding materials, originally started with covered electrodes ， have been developed into more efficient submerged arc welding materials and gas ? shielded arc welding materials with which automatic welding and robotic welding can easily be conducted. the gas ? shielded arc welding materials can be classified mainly into solid wires and flux ? cored wires ( fcws ), and of these wires ， fcw has been increasing in uses year by year because of its excellent workability and efficiency. this article describes the recent trends in the development of fcws which now hold the major position in the welding materials. a special focus is put on the fcws for carbon steels
90年前，日本的造船業開始使用藥皮焊條.自此，日本的弧焊技術取得了長足進步.弧焊技術的歷史是焊接工藝"高速度、高效率"的歷史.自藥皮焊條開始焊接材料已發展成為更高效的埋弧焊焊材和氣保焊焊材，並能更容易地結合自動化焊接和機器人焊接.氣保焊焊材主要分為實芯焊絲和藥芯焊絲，藥芯焊絲的應用因其出色的實用性和效率而逐年增加.介紹了藥芯焊絲作為主要焊材的發展趨勢，尤其是在碳鋼焊接上的應用
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