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The Rotterdamsche Droogdok Maatschappij (RDM), was the largest pre-World War II shipbuilding and repair company in Rotterdam in the Netherlands, existing from 1902 to 1996.〔(''Honderd jaar Rotterdamsche Droogdok Maatschappij (100 years of RDM)'' ) (in Dutch)〕 It built 355 mostly major seagoing vessels, 18 of which were submarines.〔RDM on the Dutch Wikipedia〕 During its existence, the wharf operated 12 floating docks and in its heyday employed 7.000 people at one time. ==History== RDM was established on 23 January 1902 in the Heijplaat district, located on the banks of the river Meuse (locally named 'Maas'). It was a movement of a company founded in Delfshaven in 1856 by Duncan Christie. On 14 January 1925, a shipbuilding facility was set up as a subsidiary on the northern bank in Schiedam and continued to function as a separate establishment until 1978. In 1928/29 the so-called 'Onderzeebootloods' (submarine hall) was built. This was enlarged three times. Here, 17 Dutch and 1 Polish submarine were constructed. Two of the subs fell into German hands in May 1940, and duly served in the Kriegsmarine, the navy of Nazi Germany. The Germans also found the snorkel here, a Dutch invention. This apparatus allows subs to use their diesel engines under water, greatly extending their range, and subsequently all German U-Boats were equipped with this. The hall is now part of the so-called RDM Campus, a combination of research and development companies and a college. In 1938, the RDM bought, with Wilton-Fijenoord, all shares of P. Smit Jr. Shipbuilding and Machine Factory of D.G. van Beuningen. This company remained under its own name during its existence. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rotterdamsche Droogdok Maatschappij」の詳細全文を読む スポンサード リンク
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