东西
发表于 2025-3-25 04:37:13
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炼油厂
发表于 2025-3-25 09:55:30
e der Schweiße nicht nur bei Probeschweißungen, sondern auch bei allen laufenden Betriebsarbeiten zu erstreben, und um diese Güte zu erreichen, sind wiederum Prüfungen der Schweiße unerläßlich. Es darf zunächst nicht übersehen werden, daß die Güte der Schweißungen von einer ganzen Reihe von Größen a
PANG
发表于 2025-3-25 15:31:23
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Isometric
发表于 2025-3-25 18:10:34
L. Tetley I. Eng., F.I.E.I.E.,D. Calcutt M. Sc., C.Eng., M.I.E.E.rschleppt werden, auch öfter in der Mehrzahl vorhanden sein können, nie aber den ganzen Körper auf einmal befallen. Wir haben es jetzt dagegen mit einer tuberkulösen Erkrankung zu tun, die sich mit einem Schlage über den ganzen Körper verteilt und ausbreitet, Freilich ohne Herderkrankung geht es doc
特别容易碎
发表于 2025-3-25 21:38:04
chanics as a whole and it was his pioneering research in the first half of the 20th century that founded modern fluid mechanics. His book `Fuhrer durch die Stromungslehre’ or `Essentials of Fluid Mechanics’ appeared in 1942. Even today it is considered one of the most important books in the area....
平息
发表于 2025-3-26 00:16:47
The GMDSS radionetmay be carried out by relatively inexperienced persons. The Global Maritime Distress and Safety System (GMDSS) has been developed to provide mariners with a global communications and locating network, the elements of which are capable of being operated by an individual with minimum communications kn
灾祸
发表于 2025-3-26 05:29:45
Satellite orbital parameters and outline satellite communication principlesation of GMDSS equipment, it will aid system understanding if the rudimentary principles of satellite orbits are considered. The space segment of the GMDSS currently includes two types of satellite each with a very different type of orbit. GMDSS distress alerting may be achieved using the COSPAS/SAR
不给啤
发表于 2025-3-26 12:14:14
The Inmarsat organizationdes global communications for mobile users. Whilst Inmarsat was originally established to serve the communication needs of the international maritime industry, the organization’s sphere of influence has now been extended to aeronautical, vehicular and land-based mobile systems. The Inmarsat communic
SLING
发表于 2025-3-26 15:58:53
The Inmarsat-A systemations for the marine user. Prior to that date a similar service was provided by the US COMSAT organization and was known as Marisat. The number of ship earth station fittings has massively increased since 1976. Demand for satellite channels has increased as a consequence, leading to the launch of n
MEEK
发表于 2025-3-26 17:37:49
The Inmarsat-C systemrincipal advantages of the system when compared with Inmarsat-A, are that it is low cost, small and uses a very small omni-directional antenna. Its main disadvantage is, of course, that voice communication is not possible. It should be remembered however, that information transfer by voice communica