brass-wind instrument是什么意思

用法例句

FEM simulation of the optimization of the die angle with the floating plug drawing process of copper tubes;

铜管游动芯头拉拔模具角度优化的有限元模拟

Research on the Influence of Sewage on Copper Tube Corrosion When Reclaiming Heat Energy From Sewage;

回收污水热能时污水对铜管腐蚀的影响研究

Development of a Special Polish-grinding Machine for Outside Surface of a Crystallizer Copper Tube on Conticaster;

连铸机结晶器铜管外表面抛磨专机研制

Firstly, In the experiment of this article, PE-RT, PE-X, PP-R and Cu pipe are used as heating pipes.

首先,以耐高温聚乙烯(PE-RT)、交联聚乙烯(PE-X)、无规共聚聚丙烯(PP-R)和铜管四种不同热阻的典型管材作为加热管,分别对其进行地板辐射供暖传热实验,由实验得出几种不同加热管管材下,地板单位面积散热量与供回水平均温度的关系公式,并对几种管材的散热量进行了比较,从传热学的角度对这种差别进行了解释和深入分析;课题还进行了流速对地面散热量的影响实验,并利用边界层理论对该影响进行了理论分析;实验通过更换地面层,进行了地面层对散热量和向下热损失影响的实验,得到水泥、瓷砖和木质地板三种面层下,地板散热量的大小比例关系和三种面层下地板向下的热损失。

Influence of fulvic acid on soluble copper release in soft water from copper pipe/phosphate system.;

软水中富里酸对铜管/磷酸盐体系溶解性铜释放影响

Modeling decay of chloramines residuals by copper pipe distribution test loop system;

铜管模拟输配系统中氯胺衰减过程与模拟

Rational design of copper pipe in building water supply;

铜管在建筑给水中的合理设计

Protective measures of copper tubes of the steam condenser in steam power plants;

火力发电厂凝汽器铜管保护

To simulate ammonia corrosion process of copper tubes in the air removal section of condenser in power plant,immersion tests of copper tube samples are conducted in ammonia solutions with ammonia 50～20000 mg/L,at temperatures 25℃、35℃ and 45℃ respectively.

在 16种浓度的氨溶液 (从 5 0mg/L～ 2 0 0 0 0mg/L不等 )、3种温度 (2 5℃、35℃、4 5℃ )、3种溶解氧的条件下(开口、密闭不除氧、密闭除氧 ) ,对铜管腐蚀过程及影响氨腐蚀过程的因素及规律进行了研究 。

By studying on the lubricity,adhesion,anti-heating and removing properties of the studied lubricants,a new high-speed cold drawing and heavy viscosity oil for copper tubes was developed,which avoids to produce harmful oil-smog,prevents copper tubes from being spoiled and ensures copper tubes have excellent surface quality.

通过对油品的润滑性、粘附性、耐高温性、清洗性等进行详细的研究,开发出一种新型的高粘度铜管高速拉拔外模专用油,不仅解决了铜管生产过程中油烟对工作环境污染和对人体的伤害,而且避免了铜管表面的擦伤,保证了铜管良好的表面质量。