launching cradle

基本解釋

What's the difference between building-berth and launching cradle?
船臺(tái)和下水支架有什麼區(qū)別？
Building berth is the fixed ground support and launching-cradle is only used before launching.
船臺(tái)是固定的地麪支撐，下水支架僅用於下水時(shí)用。
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Building berth is the fixed ground support and launching-cradle is only used while launching. The latter will be sliding together with the ship into the water.
船臺(tái)是固定的地麪支撐，下水支架僅用於下水時(shí)。後者在下水時(shí)與船躰一起滑入水中。