发布时间:2025-02-02 20:04:53
引孔深度就是预先成孔的深度。你们的塑料板打入深度是23m,引孔深度是12m,意思是说“先用机械或人工挖12米深,然后放入塑料板,再将剩余的11米打入”。因为成孔过程要比直接打入塑料板需要花更多的人工,所以报价单里每米单价要比塑料板高。
家里刚装修好买了一个万和的热水器可洗澡洗到中途出现冷热水的问题现在已经把它退了现在想换一台好
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