open drain造句怎么写

Make sure the discharge of this valve is directed to an open drain and protected from freezing.

open drains; the road is open to traffic; open ranks.

Temperature and pressure relief valve properly installed with a discharge line run to an open drain and protected from freezing.

"The relief valve discharge line should terminate 6"above a suitable open drain."

A little girl who suffered a horrific pool injury is said to be improving. The family of Abigail Taylor says an open drain in a swimming pool sucked out part of her small intestinal tract.