arXivLabs: experimental projects with community collaborators
GPS jamming: The invisible battle in the Middle East
，这一点在新收录的资料中也有详细论述
第三十六条 船员用人单位应当依照有关法律、行政法规和中华人民共和国缔结或者参加的有关船员劳动与社会保障国际条约的规定，与船员订立劳动合同。
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Tandy also cautioned that retention promises can be more complex than they appear. "If they say they're holding it for three years, that's the minimum amount of time they're holding it for," she said. "I wouldn't feel comfortable trusting a company that says, 'We delete everything one day after three years.' That is not going to happen," she added.