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English Translations » 【公用配套及基建圈】 » 【Daily Question】Utilities - Water Supply and Drainage - 2019

【Daily Question】Utilities - Water Supply and Drainage - 20190911

2019-09-11View Original

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The function of a trap is to create a water seal of a certain height within it, and the main purpose of this water seal is ( ). A. Preventing toxic and harmful gases or pests from entering the room B. Ventilation C. Improving drainage capacity D. Little significance. Answer: A
Reply #22019-09-11
A. Prevent toxic and harmful gases or pests from entering the room
Reply #32019-09-11
A. Prevent toxic and harmful gases or pests from entering the room 
Reply #42019-09-11
A. Prevent toxic and harmful gases or pests from entering the room 

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Translated at 2026-07-23 10:57:53

Original: https://bbs.hcbbs.com/thread-2779701-1-1.html

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