hard faced

基本解釋

Trim numbers with H have cobalt alloy hard faced seat ring facing.
帶有H的閥內(nèi)件型號具有鈷合金硬面閥座環(huán)表面。
Hardened Seating Surfaces– both disc and body seating surfaces are hard faced for maximum service life.
硬化的閥座表面–閥瓣和閥體地閥座表面都經(jīng)過表面硬化，最大限度延長使用壽命。
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.
介紹了軟密封閘閥的測試模型、方法及分析結(jié)果，對軟密封和硬密封閘閥的結(jié)構(gòu)及性能進行了比較和分析。

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