The triple point of water is 6.105 millibars and exactly 273.16 Kelvin.

水的三相点是 6。105 毫巴 和 0。01 x 正好。

It also made a lot of sense for the Mariner 9 mission to use the pressure of the triple point of water as the reference point for its Martian maps.

因为它对水手九号有意义。 使用水的三相点压力作​​为参考。