For welding low-alloy and high strength steel with corresponding strength grade.

用于相同强度等级的低合金高强钢的焊接。

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The deterioration is accelerated because the strength grade of concrete is too low, depth of cover too thin, and drain off water unsuitable.

调查表明，原设计混凝土标号过低，保护层过薄，桥面排水不当，加速了劣化过程。

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Large volume waterproof concrete with C30 strength grade and seepage resistance P>25 can be mixed by adding expansion agent and reduce-water agent.

经试验表明，在砼中复合掺加膨胀剂和高效减水剂，可制得强度等级为C30，抗渗等级P＞25的大体积防水砼。

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Lost in the celebration of those halcyon Charleston days is that the era spanning 1920 (when the 18th Amendment became law) to 1934 (when the amendment was repealed) was marked by raging culture wars, rampant xenophobia, political upheaval, and threats of death or worse that came more often via poisonous industrial-strength alcohol masquerading as low-grade liquor than the rat-a-tat-tat of a Tommy gun.

FORBES: Booked Review: Another Round for Prohibition