boundary: n.边界，疆界，限界 (between);(球场)边线；界标；界限，范围，分野。 aboundary dispute 边界纠纷。 the boundary between Canada and the United States 美加国界。 boundaries on all sides 四方辐辏之所，四通八达。
High precision and good innate safe character are needed in the measurement of oil tank multi - parameters such as liquid level and oil - water boundary 油罐液位温度参数的测量，要求较高精度和良好的本质安全性能。
