Nickel underplating prevents the migration between tin or gold platings and the base material.
垫板镀镍可防止在镀锡与基料之间的移动。
Nickel underplating prevents the migration between tin or gold platings and the base material.
垫板镀镍可防止在镀锡与基料之间的移动。
Swallows begin their migration south in autumn.
燕子在秋季开始向南方迁移。
A general method of data migration between heteroid databases was discussed subsequently.
其次讨论了异构数据库间数据迁移的一般方法。
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