watertight fittings 中文意思是什麼
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Specification for door fittings, for watertight gastight airtight, weathertight, and non - tight doors, for marine use
船用防水防氣體防空氣和防風雨門配件和非密封門規范 -
Standard specification for door fittings, for watertight gastight airtight, weathertight, and non - tight doors, for marine use
船用水密，氣密不透氣和防風雨及無夾扣門的門配件
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