定价： 345元 / 折扣价： 294 元 加购物车

定价： 481元 / 折扣价： 409 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

1. Scope 1.1 This Standard specifies requirements for the mechanical, electrical, and environmental performance of connectors designed for installation on the bare surface of overhead line conductors. Note: Although the requirements of this Standard w

定价： 501元 / 折扣价： 426 元

定价： 515元 / 折扣价： 438 元 加购物车

1.1 These test methods cover procedures for sampling and testing orange shellac, button lac, garnet lac, and bleached lac. 1.2 The sampling procedures and test methods appear in the following order: Sections Sampling: Orange Shellac, Button Lac, and Garnet Lac 3 Bleached Lac 4 Identification of Samples 5 General Requirements for Test Methods: Reagents 6 Source and Preparation of Portions of Sample for Tests 7 Insoluble Matter 8 to 9.5 Iodine Value 10 to 10.3 Purity 11 to 13.2 Volatile Matter (Moisture) 14 to 15.2 Wax 16 to 16.4 Matter Soluble in Water 17 to 17.2 Ash 18 to 18.2 Color 19 to 19.4.3 Color of Orange Shellac 20 to 20.4.4 Acid Value 21 to 21.4 Orpiment 22 to 22.4 Saponification Value 23 to 23.4 1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.> Specific hazard statements are given in Note 1.

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定价： 2317元 / 折扣价： 1970 元 加购物车

定价： 2317元 / 折扣价： 1970 元 加购物车

定价： 2317元 / 折扣价： 1970 元 加购物车

3.1 Alumina-silica refractory brick is produced from various combinations of alumina and silica-containing materials. These bricks can vary in chemical composition from almost 100 % alumina and little silica to almost 100 % silica and little alumina. It is therefore useful to establish a classification scheme based on physical properties and chemical analysis. One group, fireclay brick, is classified based on physical properties since some overlap of alumina and silica content can occur. A second group, high-alumina brick, is classified primarily based on alumina content. The classification allows those familiar with refractory materials to group similar products from various suppliers in a standard and consistent manner.1.1 This classification covers machine-made fireclay and high-alumina refractory brick, and its purpose is to set forth the various classes and types of these materials in accordance with their normal and characteristic properties, which are important in their use.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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定价： 1475元 / 折扣价： 1254 元 加购物车