Subterranean shaft: Highways Department Senior Engineer Szeto Hon-yin monitors tunnel excavation for the Hong Kong Section of the Guangzhou-Shenzhen-Hong Kong Express Rail Link.

04 Jul 2016

Subterranean shaft: Highways Department Senior Engineer Szeto Hon-yin monitors tunnel excavation for the Hong Kong Section of the Guangzhou-Shenzhen-Hong Kong Express Rail Link.

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