清扫孔装于重质油罐底部，清扫油罐时可放出罐内污泥及污水，其中50A，80B，100C带放水管，出厂时不带加强板。
清扫孔装于重质油罐底部、清扫孔油罐可放出污水扫除内污泥。
Cleanout hole series can be set at the cornet from the bottom tank shell course to the bottom of the heavy oil storage tank for cleaning and draining during maintenance.
目的：探讨淋巴结染色在闭孔淋巴结清扫术中的作用。
Objective: to study the effect of lymphatic coloration on dissecting the obturator nodes.
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