发布时间:2025-01-20 12:04:29
电缆套官的型号与电缆截面相关,也与成品外径.
一般来说,电缆的截面不得大于电缆套管的内截面40%.
电缆的截面=成品外径的平方*0.7854.
电缆套官的内截面=内径的平方*0.7854.
我买房首付款不足中介说可以通过补充协议提高总价提高贷款金额这样首付就少了这样有风险吗
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