用于地?zé)峋械,要求如下:?BR>4500m長(zhǎng),耐熱257攝氏度(外徑5.56mm
拉斷力大于2.766kg.重量0.144kg/米。
延長(zhǎng)系數(shù)0.79 m,電線鎧甲(外層/英寸)18/12HS 工作電壓1200V直流電
絕緣是0.67mm的FEP或
ETFE還要如下要求(HS鍍鋅鋼鎧裝)
HSgalvanized steel armor wires 12 of internal diameter 0.79 mm each (0.031") and external threads 18 of 0.79 mm (0.031").
This type of cable must be matched to records in geothermal wells run of 3 000m depth using electronic tools such as calipers, CBL, detonation of explosivesand CCL. [xyxiong 在 2012-2-28 10:11:57 編輯過]