When fitting a piece of pipe, how do you determine the exact position on board?
当安装一件管件时，你怎样决定管件在船上的确切位置？
I love your illustration, great mood and colors, fitting a childrens book.
我喜欢你的插画，非常棒的颜色和意境，很适合儿童读物。
When fitting a piece of pipe, how do you determine the exact position on board a ship?
当安装一管件时，你怎样决定管件在船上的确切位置？
When fitting a piece of pipe, how do you determine the exact position on board a ship?
当安装一管件时，你怎样决定管件在船上的确切位置？
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