活动器

This paper introduces different mechanical rod break-out modes,their structures,characteristics and operating programs of top-drive power head drill.

介绍了动力头式钻机的几种机械卸扣方式及其结构特点、操作程序，其中包括先卸钻杆下扣的上扣防松器、活动提篮上扣防松装置以及先卸钻杆上扣的上垫叉座装置。

Many studies about mandibular functional protrusion show that the mandibular postural position is changed and the activity of the lateral pterygoid muscle increases after the appliance is inserted and the proliferation of the condylar cartilage leads to the increases of the mandibular length.

对功能矫形前伸下颌的大量研究表明，前伸下颌的矫治器改变了下颌的姿势位，下颌前伸肌功能活动加强，明显促进了髁突和下颌骨增生，下颌骨综合长度增加。

An air straightener should be placed down stream from propeller to counteract circular air motion in the tube.

一种气体直线流动器应该使气流从推进器的反作用中使气体的活动在管内循环。

Shutters Music The movable louvers on a pipe organ, controlled by pedals, that open and close the swell box.

shutters 开闭器：管风琴上的活动百叶窗，由踏板控制增音箱的开与关

Rapid eye movement sleep consists of a dreaming state in which there is activation of the cortical and hippocampal electroencephalogram, rapid eye movements, and loss of muscle tone. Although REM sleep was discovered more than 50 years ago, the neuronal circuits responsible for switching between REM and non-REM sleep remain poorly understood. Here we propose a brainstem flip-flop switch, consisting of mutually inhibitory REM-off and REM-on areas in the mesopontine tegmentum. Each side contains GABA (gamma-aminobutyric acid)-ergic neurons that heavily innervate the other.

快动眼睡眠是一个包括有皮层和海马脑电活动的睡梦状态，可见眼球的快速运动和肌张力减低，尽管快动眼睡眠已经被发现50余年了，对其与非快动眼睡眠之间的神经回路却知之甚少，我们用脑干触发转换器，包括脑桥背盖区一个互相抑制的快动眼-关、快动眼-开区域，每侧均包含高度互相支配gamma氨基丁酸能神经元。

Like snakes, lizards have scales, pair ed male copulatory organs, and a flexible skull.

蜥蜴与蛇的外表特征相似︰具角质鳞，雄性具一对交接器，方骨可活动。

Like snakes, lizards have scales, paired male copulatory organs, and a flexible skull.

蜥蜴与蛇的外表特征相似︰具角质鳞，雄性具一对交接器，方骨可活动。

The principles of the operative technique are to (1) restore coronoid stability throughfracture fixation (type-II or III fractures7) or through anterior capsular repair (a type-I fracture),(2) restore radial head stability through fracture fixation or replacement with a metal prosthesis,(3) restore lateral stability through repair of the lateral collateral ligament complex and associated so-called secondary constraints such as the common extensor origin and/or the posterolateral capsule,(4) repair the medial collateral ligament in patients with residual posterior instability, and (5) apply a hinged external fixator when conventional repair does not establish sufficient joint stability to allow early motion.

外科手术的原则是：①通过骨折固定(2型骨折或3型骨折)或者经前方关节囊修复(1型骨折)恢复冠状突的稳定。②通过骨折固定或假体置换恢复桡骨头的稳定性③通过修复侧副韧带以及相关的所谓的次要限制如伸肌群起点和后外侧关节囊。④残余的后侧不稳，修复内侧副韧带⑤当传统的修复方法不能建立有效的关节稳定以便允许早期活动时，可以应用外固定器。

Monitoring crawler activity is an important component of SEO and Web site discoverability strategies.

监视搜索器的活动是搜索引擎最佳化和发现网站的策略的一个重要部分

Using a switch to divert the train toward one person instead of five increases activity in the dorsolateral prefrontal cortex—the place where cool, utilitarian choices are made.

使用转辙器让火车冲向一个人，而避免冲向五个人，这会增加大脑的后侧前额叶皮层的活动——这个部分会作出冷静的、功利的选择。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。