吕氏英汉字典[简体]:
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Synchronous Digital Hierarchy(SDH)
"Synchronous Digital Hierarchy(SDH)" Chinese translation ("Synchronous Digital Hierarchy(SDH)" in Chinese, "Synchronous Digital Hierarchy(SDH)" 中文翻译, "Synchronous Digital Hierarchy(SDH)"发音):
Synchronous Digital Hierarchy(SDH)
同步数字架构 [同步数字架构 ]
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