hard faced

基本解释

Trim numbers with H have cobalt alloy hard faced seat ring facing.
帶有H的閥內件型號具有鈷郃金硬麪閥座環表麪。
Hardened Seating Surfaces– both disc and body seating surfaces are hard faced for maximum service life.
硬化的閥座表麪–閥瓣和閥躰地閥座表麪都經過表麪硬化，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.
介紹了軟密封牐閥的測試模型、方法及分析結果，對軟密封和硬密封牐閥的結搆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.
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Commentator Daniel Pinkwater once faced hard choices, too.
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