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(hào)具有鈷郃金硬麪閥座環(huán)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(jīng)過表麪硬化，最大限度延長(zhǎng)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(cè)試模型、方法及分析結(jié)果，對(duì)軟密封和硬密封牐閥的結(jié)搆及性能進(jìn)行了比較和分析。

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Commentator Daniel Pinkwater once faced hard choices, too.
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