教授

Malleable iron needle valve For the nominal pressure pN ≤ 2.5MPa, a temperature of -30 ~ 300 ℃ of water, steam, air and oil and other media malleable iron valves.

可锻铸铁制针型阀门用于公称压力pN≤2.5MPa，温度为–30~300℃的水、蒸气、空气及油类等介质的可锻铸铁制阀门。

He came here in search of his watch.

他来这儿找他的表。