Nickel, cobalt and palladium electrodeposits used as barrier layer between copper basis and gold deposit can effectively reduce migration of copper atom to gold upper deposit.
以镍、钴、钯镀层作为铜基体镀金的防渗铜中间层可以有效地防止铜原子扩散到金属表面。
Eighteen million years ago, a series of remarkable events conspired to creat the Great Barrier Reef — the migration of a continent, the might of an ocean, and the full power of the tropical sun.
一千八百万年前，一系列重大事件一同策划创造了大堡礁—大陆移动，强大的海洋，热带太热的全部力量。
Eighteen million years ago, a series of remarkable events conspired to creat the Great Barrier Reef — the migration of a continent, the might of an ocean, and the full power of the tropical sun.
一千八百万年前，一系列重大事件一同策划创造了大堡礁—大陆移动，强大的海洋，热带太热的全部力量。
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