penetration tube的相关资料：
临近单词
Penetrations
penetration
penetration depth of slow neutron
Penetration Aid Deployment System
penetration color indication tube
Penetration-diffusion treatment
Penetration Depth Submarine Range
Penetration wounds of the eyeball.
penetration resistance control values
penetration colour television display
penetration of foreign monopoly capital
penetration deceleration on rigid-body
