查询词典 drilling stem

The packed valves used by Air Products employ a two- or three-piece stem in which the lower stem or spindle connects to the upper stem via a slip joint.

Air Products使用的密封阀采用两个或三个阀杆。下阀杆或轴通过伸缩接头同上阀杆连接在一起。

Valves used by Air Products employ a two- or three-piece stem in which the lower stem or spindle connects to the upper stem via a slip joint.

下阀杆或轴通过伸缩接头同上阀杆连接在一起。

Start stem O-ring seal over stem, then press into position as handle is pressed down over stem.

从阀杆上的阀杆O形环密封开始，然后在手柄安装在阀杆上后，将其压进手柄的位置上。

The results showed that the variance in stem shearing force of Alfalfa and rye grass are due to a combination of factors, including changes in chemical composition, morphological characteristics. DM and NDF degradability of alfalfa stem had negative relationships with shearing force. Shearing force could be used as an indicator of forage stem nutritive value.

对于盛花期紫花苜蓿及灌浆期冬牧70黑麦草，茎剪切力受形态学指标、化学组成的综合影响；紫花苜蓿茎剪切力与DM、NDF48h瘤胃降解率之间存在显著负相关，因此可用剪切力估计紫花苜蓿茎养分降解率的大小。

4 Stem bushing material, its hardness and strength shall be not more than stem, and in the water-soaked conditions and the valve stem, valve did not form a electrochemical corrosion.

2.4阀杆衬套材质，其硬度与强度均应不大于阀杆，且在水浸泡状况下与阀杆、阀体不形成电化学腐蚀。

Road level teacher, I firmly wrapped stem, small lips tightly forcing my folder stem, effectively sets the line, stems in the young woman comes to the pleasure of feeling Daoli systemic spread, I shiver all over in the , as if an electric shock on the same stem, Ma itch, Direct from the spinal cord to the body.

平老师的道紧紧包裹着我的茎，小唇紧紧夹迫着我的茎，有力地套撸着，茎在美艳少妇的道里感慨到快感传遍了全身，我浑身都在颤栗着，茎就仿佛触电一样，麻痒痒的，从脊髓直传到全身各处。

Nowadays, n stem-like cells have been found, which exist in the tumors of some tissues, such as haematogenesis system, brain, lung, mammary gland and so on. We defined them as tumor stem cells for their similar characteristics to the normal stem cells, but they are a minor population of tumor cells and the origin of them may be tumor cells.

随着对干细胞的研究不断深入，使人们对肿瘤的发生机制重新进行了审视，并在造血系统、脑、肺、乳腺等部位肿瘤中发现极少量的具有与干细胞非常类似生物学特性的细胞，称之为肿瘤干细胞，它们很可能是肿瘤细胞的起源。

According to various of the technical difficulties such as low drilling efficiency in hard rock and short service life of diamond drilling bit, analysis was made on the inherent links between blade-extruding of hot-pressing diamond and rock abrasiveness.

中文摘要：针对在坚硬致密岩石中钻进时效低和钻头使用寿命短的技术难题，分析了热压钻头的金刚石出刃与岩石研磨性等岩性之间的内在联系，认为钻头的胎体成分及其性能是关键，硬而带脆性的胎体性能有利于金刚石出刃，从而能提高钻进速度。

Electro-spindle drilling and milling, including ADX, ADM the two series, with the CNC drilling, CNC milling, engraving machine, woodworking router and milling machine tools, such as matching.

钻铣电主轴包括ADX、ADM两大系列，与数控钻、数控铣、雕刻机、木工镂铣机等机床配套。

The control system of NC drilling machine which takes the PLC as the main controller is used in drilling machine. It controls the aiguille moving from one positioning to another positioning relative to the positioning of the workpiece. The system consists of PLC, stepper motor driver, stepper motor, HMI, and so on.

摘 要：数控钻孔机控制系统是用在孔加工机床上，以可编程序控制器为主控制器，控制钻头相对于工件的定位，由一个定位点向另一个定位点的控制系统。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。