查询词典 plunger

Top quality hydraulic pump with welded construction,Hard chrome plated pistion and pump plunger ensuer durability and corrosion resistance .

液压缸体用优质钢焊接而成，活塞式液压泵活塞杆、泵芯镀硬铬，耐磨、耐腐蚀。

Top quality hydraulic pump with welded construction,Hard chrome plated pistion and pump plunger ensuer durability and corrosion resistance .

液压缸体为整体铸件结构，密封性强、柱塞杆、泵芯镀硬铬，耐磨、耐腐蚀。

Top quality hydraulic pump with welded construction,Hard 菌 chrome plated pistion and pump plunger ensuer durability and corrosion resistance.

液压缸体为优质钢焊接而成，柱塞杆、泵芯镀硬铬，耐磨、耐腐蚀。安全阀过载保护。超高强度货叉结构具有满载慢降、空载快降功能。

The cupcake froster comes with a frosting tube with a plunger and decorator-type tip.

该蛋糕froster带有一个结霜管和装饰用柱塞式的一角。

In order to do research on pipe flow and pump characteristics of polymer flooding and water flooding rod-pumped well in especially high water-cut stage, rheometric test aimed at production stream from polymer flooding and water flooding rod-pumped well in especially high water-cut stage has been made, and the characteristic of production stream in especially high water-cut stage is confirmed as Newtonian fluid. Experiments using different mediums about pipe flow and pump characteristics is made. Frictional resistance and coefficient of friction resistance of annulus fluid between sucker rod and the pipe flow is calculated under different working conditions. Frictional resistance between plunger and pump barrel under different parameters is calculated based on related theory of pump characteristic and the strained analytical model of oil-well pump. Besides, using the theory of slit flow and hydraulic -clamping pressure, the frictional resistance is calculated, and the error between the result and measured value is no more than 13%.

为研究特高含水期水驱及聚驱抽油机井管流特性与泵特性，本文针对特高含水期水驱及聚驱井采出液进行了流变性试验，确定了特高含水期油井采出液的性质属牛顿流体；利用不同介质，进行管流特性与泵特性试验，得到了不同工况下杆、管环空流的摩擦阻力和摩阻系数；根据泵特性相关理论和抽油泵受力分析模型，计算了不同参数下柱塞与泵筒间的摩擦阻力，并利用缝隙流与液压卡紧力理论对柱塞与泵筒间的摩擦阻力进行了计算，计算结果与实测值误差在13%以内。

A plunger (24) having an elongate body portion (25) and a stopper (54) slidably positioned in fluid-tight engagement with the inside surface (32) of the barrel (22) is provided.

配置具有拉长主体部分(25)和止动件(54)的柱塞(24)，所述止动件以与针筒(22)的内表面(32)液密啮合的方式滑动定位。

Based on the research of the predecessor's production and the theoretic study, and establishs a mechanics and mathematical model of the horizontal well testing string and optimizes the composition and parts of the testing string. And the plunger effect, spiral bending effect, temperature effect and tympanites effect of the pipe string-packer system are analysed. At the same time, both the model of thermal field and pressure field are studied in accordance with technical peculiarity on site.

本文通过对前人研究成果的调研，建立了水平井测试管柱的力学模型和数学模型，并对测试管柱的结构及配件进行了优化；建立了管柱-封隔器系统的活塞、螺旋屈曲、温度和鼓胀四种基本效应的模型，同时也根据现场工艺特点建立了温度场和压力场的分布模型。

Withdraw the plunger as far as possible by unscrewing anti-clockwise to the maximum extent.

把活塞装入带卡口的杯体中，之后按逆时针方向松开卡口底座螺丝将活塞经可能地拔出到最大体积。

With the same ardor he displayed as a stock-plunger, Livermore hurled himself into the exciting role of yachtsman.

他对游艇的热情不亚于股票，利弗莫尔很快就沉浸于游艇之中了。

An adjustable pipette (10) includes a body (12) containing a plunger assembly (14) including a thumb button (22) that is axially moved in alternating relatively shorter sample aspirating and relatively longer dispensing strokes.

一种可调节吸管(10)，包括本体(12)，该本体装有一柱塞组件(14)，该柱塞组件(14)包括一拇指按钮(22)，该拇指按钮(22)可在交替改变的相对较短的试样吸取冲程和相对较长的试样分配冲程中轴向运动。

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。