The nephrite in Qinghai occurs within the internalcontact zone between granite and marble.
青海软玉产于花岗岩与大理岩的内接触带。
2
Dongping gold deposit occurs in the internalcontact 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。
3
Material and medium valve internalcontact parts are made of structural ceramic materials, to avoid direct contact with the media, and produce corrosion may.