1.1 SCOPE 1.1.1 This standard applies to newly produced compressed Natural Gas Vehicle (NGV) dispenser shear valves and fueling hose emergency breakaway shutoff devices, hereinafter referred to as devices. [It is not applicable to "Vehicle Refuelin

定价： 637元 / 折扣价： 542 元

NONE

定价： 546元 / 折扣价： 465 元

1.1 Scope 1.1.3 (DELETED) (Former 1.1.4 through 1.1.9 become 1.1.3 through 1.1.8, respectively).

定价： 319元 / 折扣价： 272 元

This part specifies a common interface by which financial transaction card-originated messages can be interchanged between acquirers and card issuers. It specifies message structure, format and content, data elements and values for data elements. The method by which settlement takes place is not within the scope of this part.

定价： 1593元 / 折扣价： 1355 元

Scope Details test and examination criteria for manually operated gas valves which are substantially of the plug and body, or rotating disc type, and to valves of other types which will provide equivalent performance. The standard presents minimum lev

定价： 774元 / 折扣价： 658 元

定价： 5597元 / 折扣价： 4758 元

Scope Details test criteria for gas convenience outlets and optional enclosures capable of operation at ambient temperatures between 32°F and 200°F (0°C and 93.3°C) if intended for Indoor Use Only, or between -20°F and 200°F (-28.8°C and 93.3°C) if int

定价： 3686元 / 折扣价： 3134 元

1.1 Scope 1.1.1 This standard applies to newly produced compressed Natural Gas Vehicle (NGV) fueling connection devices, hereinafter referred to as devices, constructed entirely of new, unused parts and materials. NGV fueling connection devices shall

定价： 637元 / 折扣价： 542 元

Scope: Details test and examination criteria for automatic storage water
heaters with input ratings of 75,000 Btu per hour (21 980 W) or less for use with natural, manufactured and mixed gases, liquefied petroleum gases, and LP gas-air mixtures.

定价： 819元 / 折扣价： 697 元

定价： 6825元 / 折扣价： 5802 元

Details test and examination criteria for connectors suitable for non-rigid connection of outdoor gas appliances not frequently moved after installation, or manufactured (mobile) homes to gas supply lines containing natural, manufactured, mixed and liquef

定价： 728元 / 折扣价： 619 元

定价： 774元 / 折扣价： 658 元

定价： 6598元 / 折扣价： 5609 元

定价： 55元 / 折扣价： 47 元

For the purpose of compatible interconnection of stations by way of a LAN using the token-passing bus access method this standard (1) Specifies the electrical and/or optical and physical characteristics of the transmission medium, (2) Specifies the electrical or optical signaling method used, (3) Specifies the frame formats transmitted, (4) Specifies the actions of a station upon receipt of a frame, (5) Specifies the services provided at the conceptual interface between the Medium Access… read more Control (MAC) sublayer and the Logical Link Control (LLC) sublayer above it, (6) Specifies the actions, entities, and values used to manage the MAC sublayer and Physical Layer Entity (PLE). Within this standard the operation of a station is specified in terms of the layered model shown in Fig 1-1 and described in ISO 7498 : 1984 [13]. 1 Additional information on the 802 family of LAN standards can be found in IEEE Std 802- 1990 [9]. 2 Figure 1-1 also shows which sections of the standard specify interfaces between layers and which sections specify the operation of the layers themselves. Recommendations for frequency allocations for community antenna television (CATV) systems are subjects for national standardization and are outside the scope of this International Standard. read less

定价： 253元 / 折扣价： 216 元