查询词典 shallow-headed

This new bit,with short bit profile shallow inner cone and double cutter structure,was designed considering the dynamics balance.

该PDC钻头采用短剖面形状，特殊双重切削布齿结构，又对钻头进行了力平衡设计，把钻头的侧向力减到最小，增加了钻头工作时的稳定性。

The results indicate that the previous events in shallow earthquake doublets do have "triggering" effect on the following event, but the effect is very weak.

这表明(1)浅源"地震对"前面地震事件产生的静态库仑破裂应力变化确实对后续地震有一定的"触发"作用，但这种"触发"作用很小。

To their credit, you won't find predictably shallow invocations of past country icons or any self-conscious, in-your-face down-home twang added strictly to remind the listener of the musical premise.

值得表扬的是，专辑中你不会找到加进去的过去的乡村偶像的那种可预见的浅显的祈祷啦，或是自省啦，在你的脸上看到什么啦，或是回家啦那些一下子就让听众们回到以前的音乐中的元素。

The canyons of slope mudflow are shallow and wide and mostly occur downslope, and sometimes those that obliquely intersect the slope direction but are parallel to the strike of the strata are also seen.

坡面型泥石流沟浅而宽，大多顺斜坡的倾向发生，也有斜交坡向而沿岩层走向发生，是沟谷型泥石流发育的雏形。

The bigger top tension will cause the wellhead to be over-pulled and increase the probability of wellhead collapse. As the mean drifting of drilling vessel or platform increases, the wellhead displacement and bending moment nearly linear enlarges. The greater current velocity may result in wellhead instability because of its limited bearing moment capacity. Therefore the drifting control is very important to subsea wellhead stability. The wellhead stability may be improved by taking measures such as enhancing the conductor bending strength, controlling scour depth on seabed, getting geological data sampling of shallow formations.

算例分析表明，水下井口的横向偏移及弯矩随张力比和海流流速的增加而大幅增大，顶张力过大会引起井口稳定性变差；随着钻井船或平台漂移量的增加，井口的横向偏移和弯矩近似线性增加，控制好钻井船或平台的漂移非常重要；由于井口承受弯矩的能力有限，较大海流流速情况下可能造成井口失稳；提高导管抗弯强度、控制泥线处管柱冲刷、获取浅部地层的取样数据等措施可以增强井口稳定性。

In order to know the effects of mulch-drip irrigation on soil enzyme activities of saline-sodic soil with shallow water table, activities of alkaline phosphatase, urease, and invertase around the dripper, within 30 cm in horizontal direction and 40 cm in vertical direction from the dripper during the reclamation process, were investigated. Changes and distribution of soil enzyme activities, also their relationships with principal soil environment factors were studied.

为了解地下水浅埋区重度盐碱地覆膜滴灌对土壤酶活性的影响，测定了重度盐碱地在滴灌利用过程中距离滴头不同水平位置（0～30 cm）和垂直深度（0～40 cm）的土壤碱性磷酸酶、脲酶和蔗糖酶活性，并对土壤酶活性的变化、空间分布特征及与土壤环境因子之间的相关关系进行分析。

Silvery and bluish drumfish of shallow California coastal waters .

加利福尼亚浅水中银白蓝色的石首鱼。

Silvery and bluish drumfish of shallow California coastal waters.

加利福尼亚沿岸浅水中银白带蓝色的石首鱼。

Silvery nd bluish drumfish of shallow California coastal waters .

加利福尼亚沿岸浅水中银白带蓝色的石首鱼。

This revolution was primarily a dry farming operation with springs and shallow hand-dug wells supplying domestic needs.

这次革命主要是旱田耕作而以泉水和人工开挖浅井提供生活用水。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。