发布时间:2025-01-31 03:48:06
公称直径/mm 公称截面面积/mm2 有效截面系数 理论截面面积/mm2 理论重量(kg/m) 18 254.5 0.95 267.9 2.11 25 490.9 0.94 522.2 4.10 32 804.2 0.95 846.5 6.65 40 1256.6 0.95 1322.7 10.34 50 1963.5 0.95 2066.8 16.28
我开了一家具公司以业务员跑单为主但是现在几个月下来也没有做成一单生意我该怎么办
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