The nephrite in Qinghai occurs within the internal contact zone between granite and marble.
青海软玉产于花岗岩与大理岩的内接触带。
Dongping gold deposit occurs in the internal contact belt between Shuiquangou alkali mixtite and old layers.
东坪金矿床赋存于水泉沟碱性杂岩体与老地层的内接触带上。
To determine the internal gear pair design parameters of two-stage internal contact involute planet gear reducer all constrained conditions from machining to assembly must be satisfied.
确定双内啮合渐开线行星齿轮减速器内齿轮副的设计参数，从制造到安装有许多限制条件。
To determine the internal gear pair design parameters of two-stage internal contact involute planet gear reducer all constrained conditions from machining to assembly must be satisfied.
确定双内啮合渐开线行星齿轮减速器内齿轮副的设计参数，从制造到安装有许多限制条件。
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