查询词典 butterfly

The major disadvantage of using metals in valves is their poor corrosion resistance as the coating and Flange type turbine-driven butterfly valve sealing materials used are not impermeable.

在使用金属阀门的主要缺点是他们作为扶贫的涂层耐蚀性和使用的密封材料不防渗。

Valve ports should have sufficient Butt-clamped turbine-driven three-butterfly valve depth of the American National Standards Institute ANSI thread, or longer weld ports, and valves and pipe fittings in accordance with the United States Manufacturers Standardization Society MSS-SP110 standards for manufacturing.

阀门连接端口应该具有足够深度的美国国家标准协会ANSI螺纹，或加长焊接端口，并按照美国阀门和管件制造商标准化协会MSS-SP110标准制造。

Back Tattoo pictures and designs of tribal , butterfly, Celtic, scorpion, dragon, flowers, fairy, flower, dolphin, zodiac, skull, dragonfly, angel, cross, floral, heart, tiger, turtle, sun, star, animal, raven, celestial and temporary body art ...

回到部落纹身图案图片和蝴蝶、塞尔特、蝎子、飞龙、花卉仙子、花卉、海豚、生肖、头骨、蜻蜓、天使交叉插花，心，虎，乌龟，太阳明星动物，乌鸦、天体和临时身体艺术：： Size Calculator。

A butterfly through the green shadow, shake off some of the flower branches in April, the dance accompanied by diffuse light floral strong, have a passion for flying.

一只蝴蝶穿过绿影，扑落在四月一些花的枝头，轻漫的舞姿伴着花香浓烈，有一种飞翔的激情。

Good and simple choices and inviting to the taste bud is the Butterfly cake/ Gingerbread/ Spice cake/ Sponge cake, the list is endless.

良好的和简单的选择，并邀请到味蕾是蝴蝶蛋糕/姜饼/香料蛋糕/海绵蛋糕，名单是无止境的。

This company mainly produces oil level table, gas relays, pressure release valve, shrink tape, valve, butterfly valve, transformer switches, etc. dozens of decomposition products.

本公司主要生产油位表、气体继电器、压力释放阀、收缩带、活门、蝶阀、变压器分解开关等数十种产品。

The butterfly valve is designed to meet the semiconductor, chemical, petrochemical, paper pulp, mining, food, sugar refining, sewage, air pollution control, oil and gas and marine industries and a series of applications designed.

该蝶阀是为满足半导体、化工、石化、纸浆、矿业、食品、炼糖、污水、空气污染控制、油气和船舶等行业等一系列应用而设计的。

Nut Series: Hex flange nuts, rivet nuts, rivet stud pressure (through-hole and hole barrier), up rivet nut, nylon nut, with sets of teeth, K nut, square nuts, butterfly nuts, cap-type nut, bolts, Mei-type shrapnel, Groove nut, welding nut, thin nuts, conical teeth outside the mother, Nut, the plastic nut, valve nut, pipe joints, back caps, sleeves and other metal products.

螺母系列：六角法兰螺母、铆螺母、压铆螺柱、涨铆螺母、尼龙螺母、内套牙、K螺母、方螺母、蝶型螺母、盖型螺母、螺栓、梅型弹片、槽型螺母、焊接螺母、薄型螺母、内外牙锥母、防松螺母、塑胶螺母、阀螺母、管接头、倒帽、套筒等五金产品。

Fuding black company engaged in G684, butterfly blue series, Chengde Green Series, and the gray linen China and other stone blocks, polished plate matt board fire plate, sheet, Taiwan board, project board, cutting ax stone, tombstones, small square stone , and all kinds of construction stone and special-shaped stone with supporting the production, processing and marketing.

公司主要从事G684福鼎黑，蝴蝶蓝系列，承德绿系列，及华夏灰麻等石材荒料，磨光板亚光板火烧板、薄板、台板、工程板、剁斧石、墓碑石、小方石、及各种建筑工程配套用石和异型石材的生产、加工、销售。

Enterprise specializing in pumps, valves, pipes, pipe fittings, corrosion-resistant equipment, mechanical equipment, steel-lined plastic·úmaterials and various types of product development, design, production and sales of main products have fluoroplastics pump, steel-lined PTFE pump , liquid pumps, self-priming pump, magnetic pump, centrifugal pump, stainless steel pump, fluorine plastic lined plug valves, butterfly valve, ball valve, valve, check valve, valve, gate valve, pipe fittings and steel equipment ten Level of stress, some more than 1120 kinds of model specifications.

企业专门从事水泵、阀门、管道、管件、防腐设备、机械设备、钢衬氟塑料及全塑各类产品的研发、设计、生产和销售，主要产品有氟塑料泵、钢衬四氟泵、液下泵、自吸泵、磁力泵、离心泵、不锈钢泵，氟塑料衬里旋塞阀、蝶阀、球阀、截止阀、止回阀、隔膜阀、闸阀、管道件及钢塑设备十个压力等级，约1120多种型号、规格。

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。