定价： 1840元 / 折扣价： 1638 元 加购物车

定价： 1290元 / 折扣价： 1149 元 加购物车

定价： 816元 / 折扣价： 727 元 加购物车

定价： 816元 / 折扣价： 727 元 加购物车

定价： 1840元 / 折扣价： 1638 元 加购物车

定价： 541元 / 折扣价： 482 元 加购物车

定价： 816元 / 折扣价： 727 元 加购物车

定价： 816元 / 折扣价： 727 元 加购物车

定价： 541元 / 折扣价： 482 元 加购物车

定价： 1099元 / 折扣价： 979 元 加购物车

定价： 1656元 / 折扣价： 1474 元 加购物车

This specification covers the design and dimensional requirements for four types (Types I, II, III, and IV) of disposable bacteriological (Pasteur-type) nonvolumetric glass pipets suitable for replicate dispensing of drops of solutions and suspensions for laboratory purposes. The pipets shall be made of good quality, clear glass of either Type I, Class A or B (borosilicate), or Type II (soda lime). They shall be of a one-piece glass construction and each type shall correspondingly meet the requirements for overall length, body length, body outside diameter, body wall thickness, top-to-constriction distance, and tip inside diameter.1.1 This specification covers requirements for four types of glass disposable bacteriological (Pasteur type) nonvolumetric pipets suitable for replicate dispensing of drops of solutions and suspensions for laboratory purposes.FIG. 1 General Form of Glass Disposable Pasteur Pipets1.2 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.

定价： 515元 加购物车

This specification describes the physical requirements and corresponding test methods for disposable glass blood sample capillary tubes for use in microhematocrit procedures. Covered here are two different types of capillary tubes, namely, Type I (coated with heparin), and Type II (uncoated). The tubes shall be fabricated from Type I, Class B borosilicate glass, or Type II soda lime glass. Conversely, the heparin used for coating Type I tubes shall be of ammonium salt isolated from the lungs or intestinal mucosa of beef or pork origin. The tubes shall conform to specified requirements for design, dimension, workmanship, color coding, and lot or control number. They should also pass the following tests for capillarity, fluidity, sheep plasma, positive and negative controls, human whole blood, heparin potency assay, and resistance to centrifugal force.1.1 This specification covers disposable glass blood sample capillary tubes for use in microhematocrit procedures.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.

定价： 515元 加购物车

5.1 This test method is intended to provide a simple inexpensive means of generating conservative, comparative data on pullout strengths of various ties and anchors used with different types of masonry units and mortars. This test method is recommended for such use until economical, improved methods can be developed to simulate service conditions more inclusively.1.1 This test method provides procedures for determining the ability of individual masonry ties and anchors to resist extraction from a masonry mortar joint.1.2 Two laboratory testing procedures are provided for use with test specimens which consist of a masonry tie or anchor embedded in mortar between twin stack-bonded masonry units.1.2.1 Procedure A—For use with small (brick-size) masonry units.1.2.2 Procedure B—For use with large (block-size) masonry units.1.3 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.1.4 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 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.

定价： 590元 加购物车

4.1 The term reference as employed in this practice implies that both the glass and the metal of the reference glass-metal seal will be a standard reference material such as those supplied for other physical tests by the National Institute of Standards and Technology, or a secondary reference material whose sealing characteristics have been determined by seals to a standard reference material (see NIST Special Publication 260).4 Until standard reference materials for seals are established by the NIST, secondary reference materials may be agreed upon between producer and user.51.1 This practice covers procedures for preparing and testing reference glass-to-metal bead-seals for determining the magnitude of thermal expansion (or contraction) mismatch between the glass and metal. Tests are in accordance with Test Method F218 (see Section 2).1.2 This practice applies to all glass-metal combinations, established or experimental, particularly those intended for electronic components.1.3 The practical limit of the test in devising mismatch is approximately 300 ppm, above which the glass is likely to fracture.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 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.

定价： 515元 加购物车