四线双交换four strand double crossing over
双磁铁电子枪double magnet gun
双阴道double vagina
双唇[症]double lip
双柱龙门刨铣床double column plano-milling machine
肺脏移稙(双肺，连续性或同时性)Lung transplantation (bilateral sequential or en bloc double lung)
液力双笼式榨汁机hydraulic double-cage press
双抗体放射免疫测定radioimmunoassay double antibody(test)