ball plug 弹子孔塞销
ball powder 球形火药
ball prover 球型校验器
ball race 滚珠座圈
ball rebound test 球回跳实验
ball relief valve 球形安全阀
ball retaining plug 塞销
ball safety valve 球形安全阀
ball sealer 封堵球
ball sealing 球封
ball section 球节
ball srew type 循环钢球式
ball test 钢球实验
ball thrust bearing 滚珠止推轴承
ball type surface controlled safety valve 地面控制的球型安全阀
ball type tubing safety valve 油管球形安全阀
ball valve sample chamber 球阀取样器
ball valve 球阀
ball viscometer 球式粘度计
ball 球
ball 压载;压舱物
ball-and-chain crawler 球形刮刀
ball-and-dish seat type valve 球及球座型阀
ball-and-pillow structure 球-枕状构造
ball-and-roller bearing 滚珠-滚柱轴承
ball-and-seat 单流阀
ball-and-socket bearing 球窝轴承
ball-and-socket joint 球窝接头;球形铰链联结
ball-and-socket valve 球形阀
ball-bore calibration device 球-孔标定装置
ball-locking finger 锁紧球指针
ball-off 投球封堵
ball-park recovery factor 小型试注回采率
ball-point penetrator 球体贯入度仪
ball-type 球式
ball-up 泥包钻头
ballas 工业用金刚石
ballaset 巴拉赛特
ballast cell 压载室
ballast concrete 石碴混凝土
ballast lamp 镇流管
ballast pump 压载水泵
ballast road 石碴路
ballast tank 压载罐
ballast tray 重型浮阀塔盘
ballast trimming 压载调整;纵倾调整
ballast water 压舱水
