Nickel underplating prevents the migration between tin or gold platings and the base material.
垫板镀镍可防止在镀锡或金层与基料之间的移动。
；迁动速Nickel underplating prevents the migration between tin or gold platings and the base material.
垫板镀镍可防止在镀锡或金层与基料之间的移动。
Swallows begin their migration south in autumn.
燕子在秋季
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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我们指正。
