定价： 0元 / 折扣价： 0 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

4.1 The effects of silver migration are short circuiting or reduction in insulation resistance. It is evidenced by staining or dicoloration between the cathode and anode conductive traces.4.2 Accelerated testing may be accomplished by increasing the voltage over the specified voltages. (A typical starting point would be 5Vdc 50mA).1.1 This test method is used to determine the susceptibility of a membrane switch to the migration of the silver between circuit traces under dc voltage potential.1.2 Silver migration will occur when special conditions of moisture and electrical energy are present.

定价： 0元 / 折扣价： 0 元

定价： 515元 / 折扣价： 438 元 加购物车

This practice covers the minimum requirement for and methods of installation for rigid poly(vinyl chloride) (PVC) fencing systems and fence accessories, it is intended to guide those responsible for or concerned with installation of rigid (PVC) fence systems. The procedure for installation of posts, installation of rails and section, installation of post caps and picket tops, and installation of gates on posts are presented in details.1.1 This practice covers the minimum requirement for and methods of installation for rigid poly(vinyl chloride) (PVC) fencing systems and fence accessories in areas where the maximum frost penetration does not exceed 30 in. [76 cm]. In all cases, refer also to the specific manufacturer's instructions for installation.1.2 This practice is intended to guide those responsible for or concerned with installation of rigid (PVC) fence systems.1.3 This practice does not preclude any test method that is proven to give equal or better performance under any weather, soil, or frost conditions.1.4 End-use and applicable code requirements shall be considered in the choice of fence style, spacing, height, and installation method.1.4.1 Paddock fencing for livestock may need to be more durable than perimeter fence.1.4.2 Residential fence styles may not be designed for balcony or guardrail use.1.5 The values stated in inch-pound units are to be regarded as standard. The values given in brackets are for information only.1.6 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.1.7 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 / 折扣价： 438 元 加购物车

定价： 1662元 / 折扣价： 1413 元 加购物车

4.1 This test method is used to determine a physical property of a wax and may determine the utility of the wax, as well as being a significant quality control test.1.1 This test method describes the determination of the viscosity of polyethylene wax using small-volume, concentric cylinder, rotational viscometer and a temperature bath at 140 °C.1.2 The values stated in SI units are to be regarded as standard. The units in parentheses are provided for user convenience and are not standard.1.3 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.1.4 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 / 折扣价： 438 元 加购物车

定价： 156元 / 折扣价： 133 元 加购物车

定价： 260元 / 折扣价： 221 元

定价： 156元 / 折扣价： 133 元 加购物车

Update #2 was published as notification that this is now a National Standard of Canada This PDF includes Update #2 and #3 1 General NOTE - This Part is intended to be read together with the Standard for Low-Voltage Fuses - Part 1: General Require

定价： 1775元 / 折扣价： 1509 元

1 Scope This clause of Part 1 is applicable except as follows: 1.1 Addition: This standard applies to planers.

定价： 2366元 / 折扣价： 2012 元

Provides specifications for format and recording for a 1/2 inch, 9-track magnetic tape to be used for information interchange among information processing systems, communication systems, and associated equipment utilizing ANSI X3.4:1977, American National Code for Information Interchange (ASCII). This standard deals solely with recording on magnetic tape and supports and complements ANSI X3.40:1983, Unrecorded Magnetic Tape for Information Interchange, (9-Track 800 CPI, NRZI, 1600 CPI, PE and 6250 CPI, GCR).

定价： 546元 / 折扣价： 465 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