hard faced

基本解释

Trim numbers with H have cobalt alloy hard faced seat ring facing.
带有H的阀内件型号具有钴合金硬面阀座环表面。
Hardened Seating Surfaces– both disc and body seating surfaces are hard faced for maximum service life.
硬化的阀座表面–阀瓣和阀体地阀座表面都经过表面硬化，最大限度延长使用寿命。
Introduce the test model, method and the analysis results of the soft faced gate valve, to carry on the comparison structure and functions of soft faced gate valve and hard faced gate valve.
介绍了软密封闸阀的测试模型、方法及分析结果，对软密封和硬密封闸阀的结构及性能进行了比较和分析。

When they had gathered all the supplies, the gold seekers then faced the extremely hard trip into Canada.
New protests groups would be formed in a few years when farmers once again faced hard times.

We have faced hard decisions about peace and war, rising competition in the world economy, and the health and welfare of our citizens.
NPR: Text of Bush's State of the Union Address
Commentator Daniel Pinkwater once faced hard choices, too.
NPR: Living With an Inability to Do Math