Watertight seal door is set on the dock and there is waterway out of the door.
该土坞设有止水密封坞门，该门外设航道。
High schools in mountainous areas should according to their characteristics, set a seal on the basic contents and general requests the sense of educational responsibility.
山区中学应根据自身特点，确定责任感教育的基本内容和一般要求。
High schools in mountainous areas should according to their characteristics, set a seal on the basic contents and general requests the sense of educational responsibility.
山区中学应根据自身特点，确定责任感教育的基本内容和一般要求。
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