Dry dock at shek o for casting for tunnel unit 铸造隧道沉管的石澳乾船坞
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Dry dock at shek o for casting of tunnel unit 铸造隧道沉管的石澳乾船坞
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Positing of a precast tunnel unit 放置预先铸成的其中一段隧道沉管
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Abstract : a dual tunneling unit scanning tunneling microscopc ( dtu - stm ） is developed for nano - metrology . this article describes themeasurement concept and the instrument of the dtu - stm . the crystalline latt ice images werescanned by the dtu - stm to check the feasibility of nano - metrol ogy . one metrological resultof test sample image was provided 文摘:研制了用于纳米计量的双元扫描隧道显微镜，介绍了双元扫描隧道显微镜的原理和仪器系统，利用该系统对原子晶格图象进行扫描，验证了纳米计量的可行性，给出了部分被测样品的纳米计量结果。
