螺旋

Summary the stud pump is that one kind of one stud type is lost the stud bush that fortune pump and stud and interior surface that its major work parts are partiality spirochaetas assume the bifilar helix face .

螺杆泵是一种单螺杆式输运泵、它的主要工作部件是偏心螺旋体的螺杆和内表面呈双线螺旋面的螺杆衬套。

The stud pump is that one kind of one stud type is lost the stud bush that fortune pump and stud and interior surface that its major work parts are partiality spirochaetas assume the bifilar helix face .

概述 螺杆泵是一种单螺杆式输运泵、它的主要工作部件是偏心螺旋体的螺杆和内表面呈双线螺旋面的螺杆衬套。

The author reviews the science and technology history home and abroad,and introduces the neoteric revolution in this field,focusing on the four scientific discoveries-the Big Bang,the quark model in material structure,the plate structure,and the DNA double helix structure-and the five technological invention-nuclear technology,space technology,information technology,biotechnology and nanometer technology-in the 20th century and their academic base of theory of relativity and quantum mechanics;and the writer...

回顾了中国和世界科学技术发展的基本历程；介绍了近代的科学革命和技术革命；重点论述了20世纪科学发现和技术发明的理论基础是相对论和量子力学，以及20世纪的四大科学发现——宇宙大爆炸理论、物质结构夸克模型、大地构造板块学说和DNA双螺旋结构和五大技术发明——核技术、空天技术、信息技术、生物技术和纳米技术；展望了21世纪科技发展前途；提供了油气开发与利用的信息。

Objective To evaluate multi-slice CT multiplanner reconstruction technique in the diagnosis of biliary tract obstruction diseases.

目的评价多层螺旋CT多层面重建技术在胆道梗阻性疾病中的诊断价值。

But for the biliverdin, it adopt a near planar and cyclic helical conformation on the silver colloid.

而胆绿素则是采取平面的环状螺旋结构平躺吸附于银胶表面。

When trade bindery Spiral of Ohio acquired Action Bindery, located near Atlanta, in 2002, it was business as usual.

当螺旋装订贸易俄亥俄州收购行动装订，位于亚特兰大， 2002年，这是一切照旧。

Siemens Biograph PET/CT is a combined positron emission tomography and computed tomography system,and combined PET/CT systems are taking place of single PET to be the main choice of clinical application.

Biograph 系列扫描仪是西门子公司研制的高性能 PET 和螺旋 CT 一体化的混合 PET/CT 扫描系统，PET/CT 混合成像系统正在取代单独 PET 系统成为临床应用的主要选择。

The cutting part of a drill usually pointed and threaded and is replaceable in a brace or bitstock or press .

的切割部分；通常是尖头的有螺旋状图案并且可以更换，用在柱柄或床上。

The cutting part of a drill usually pointed and threaded and is replaceable in a brace or bitstock or .

钻机的切割；通常是尖头的有螺旋状图案并且可以更换，用在钻柱钻柄或钻床上。

The cutting part of a drill usually pointed and threaded and is replaceable a brace or bitstock or press .

钻机的切割部分；通常是尖头的有螺旋状图案并且可以更换，用在柱柄或床。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。