燈具測試鏈
Test chain: A chain of sufficient length of an uncoated metal, having links in accordance with Figure 29 and made of 63 % Cu/37 % Zn. The chain shall have a resistance value of 2,5 Ω/m ± 20 % when stretched with a load of 200 g/m.
測試鏈:具有符合圖29規(guī)定的鏈環(huán),未涂覆且長度足夠的金屬鏈由63%銅37%鋅制成。當(dāng)以200g/m的負載拉伸時,該鏈的阻值應(yīng)為2.5Ω/m±20%。
Figure 29 – Test chain