principal datum

常见例句

雙語例句

• The deepest point is 66metres below Principal Datum in Lo Chau Mun (Beaufort Channel) north of Po Toi Island.
  最深的地方則位於蒲台島以北的螺洲門，低於海拔66米。
• The performance, characteristics and principal technical datum of GSS-800 consumable electrode water jet semiautomatic underwater cutting apparatus are also outlined.
  扼要介紹了GSS-800型半自動熔化極水噴射水下電弧切割設備的性能，特點和主要技術蓡數。
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