These vessels ride on a cushion of air when in use.
这些舰船在开动的时候，是浮在气垫上的。
Pay special attention to the mold's maintenance when in use, making it dry dustless.
在使用过程中要尤其注重模具的保养，确保干燥、无尘。
Pay special attention to the molds maintenance when in use, making it dry and dustless.
在使用过程中要尤其注重模具的保养，确保干燥、无尘。
When in use, only the well cover is rotated.
使用时只要旋转井盖。
When in use, a water pipe is connected with the connecting pipe.
使用时，将水管连接到连接管上即可。
When in use, a water pipe is connected with the connecting pipe.
使用时，将水管连接到连接管上即可。
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