core,cordboard,heart board是什么意思

用法例句

In the process of PVC low foaming solid sheet extrusion molding,it is critical to control the folw and foaming of the molten polymer.

在PVC低发泡实心板挤出成型中,控制聚合物熔体的流动和发泡是保证产品质量的关键,重点介绍了生产工艺和原理,并分析了生产中的技术要点,提出了解决的办法。

The relationship between structure of polyurethane foam sandwich panels and the frequency response;

聚氨酯泡沫夹心板的结构与频率响应特性

Finite element analysis on ultimate strength of an aluminum alloy sandwich panel;

铝合金夹心板结构极限承载能力有限元分析

The effects of cell sizes, thickness of honeycomb core of sandwich panels and skin material of sandwich panels on the frequency response of a distributed mode loudspeaker were investigated by testeing with conventional loudspeakers were studied.

在聚氨酯泡沫夹心板频响特性的研究基础上,制备了纸蜂窝为芯材,玻璃纤维布增强的环氧层压板和铜版纸为皮层材料的蜂窝夹心板,借助传统扬声器频率响应特性的测试方法,研究了不同结构夹心板的频响特性。

Prefabrication technology and quality control of pretensioning prestressed hollow plate;

浅谈先张法预应力空心板预制工艺及质量控制

The prefabrication technology of post-tensioned prestressed concrete hollow plate;

后张法预应力空心板预制工艺及要点

The molding method with fixed internal formwork of prestressed hollow plate (beam);

先张法预应力空心板(梁)内模定位成型技术

A brief discussion on prefabrication of 25 m concrete hollow plate beam;

浅谈25m空心板梁的预制

The construction technology of partial prestress pretensioned method hollow plate beam;

部分预应力先张法空心板梁施工技术

Based on the longitudinal flexural failure tests for a 30-m span PPC hollow plate beam supported by three bearings,the failure modes and ultimate carrying capacity of the beam subjected to concentrated load at midspan are studied.

通过对三支座30 m PPC空心板梁进行纵向受弯破坏试验,研究其在跨中集中荷载下的破坏形态和极限承载能力,认为采用三支座形式对梁的极限承载能力和抗变形能力无明显影响,其强度和刚度能满足设计要求。

The mechanism under shearing about the cross-hole voided slab is set forth.

阐述了圆管式空心板横孔板的受剪机理。

Combined with the practice of pretensioning prestressed voided slab,the paper discussed the construction repair,pouring and curing etc.

根据先张法预应力空心板施工实践,主要从先张法预应力梁板的施工准备、张拉、浇筑、养生等方面进行了探讨,并提出几点注意事项。

The paper analyzed the cause of prestress concrete voided slab crack,and proposed relative protective measures.

在预应力空心板冬季"蒸养"过程中,混凝土初期养护管理、升降温梯度、桥梁上下散热速度差以及大梁内是否配置防裂钢筋等都将对大梁的浇注质量产生影响。