四: four线: thread; string; wire第四线: fourth wire四线的: fourwire; quadded四线科: tetradonematidae四线期: four strand stage四线束: quad bundle四线制: four wire system; four-wire system备用四线组: reserve quad标志四线组: tracer quad等效四线制: equivalent four-wire system二四线转换: two wire four wire transformation红海四线龙: larabicus quadrilineatus间充四线组: interstitial quad两相四线制: two phase four wire system; two-phase four-wire system三度四线制: 3d-4w three dimension-four wire; three dimension four wire; three dimension-four wire三相四线: four wire three phase三相四线制: three phase four wire system; three phase four-wire system; three-phase and four-wire system; three-phase four wire system; three-phase four-wire system四线电缆: quadded cable四线电路: four wire circuit; four-wire circuit四线电路制: four-wire circuit system四线电桥: four wire bridge四线端接: four wire termination四线对绞: quad pairing四线分析: 4-strand analysis