有抗震设防时,砌砖墙留直槎时,应设拉结钢筋,其间距沿墙高___ 、埋入长度从留槎处算起每边___,端部加___弯钩,当墙宽为一砖半时设___根。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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