钻头

bit prong

钻头牙轮齿

bit program 钻头方案 | bit prong 钻头牙轮齿 | bit protector 钻头保护器

tooth wear rate

钻头牙齿磨损速度

normalized bit tooth height 标准的钻头牙齿高度 | tooth wear rate 钻头牙齿磨损速度 | tooth dull 钻头牙齿钝化程度

Side tracking and deflective bit

侧钻造斜钻头

Overall inside drilling bit of natural diamond 天然金刚石全面钻进钻头 | Side tracking and deflective bit 侧钻造斜钻头 | Bi-center reamer bit 双心扩眼钻头

undergauge bit

缩径钻头、腐蚀缩小的钻头

Batch mixed 分批混合 | Undergauge bit 缩径钻头、腐蚀缩小的钻头 | Shock sub 震击器

bit balling

钻头泥包

bit and mud socket 钻头及泥浆吸取筒 | bit balling 钻头泥包 | bit blank 钻头坯体

bottoming bit

可卸式钻头, 活动钻头

bottomer 井底把钓工 | bottoming bit 可卸式钻头, 活动钻头 | boulangerite 硫锑铅矿

bit jets

钻头水眼

bit type 钻头类型 | bit jets 钻头水眼 | bit nozzle 钻头喷嘴

mortising bit

榫眼钻头,榫眼钻头

mortise wheel ==> 嵌齿轮 | mortising bit ==> 榫眼钻头,榫眼钻头 | mortising machine ==> 制榫机,凿榫机

overuses of bit

钻头过度使用

钻头合理起钻时间 reasonable time to pull the bit | 钻头过度使用 overuses of bit | 钻头正常磨损 bit uniform wear

spudding bit

浅钻钻头 ; 侧冲钻头

"spudding","起斜卫进 ; 开钻" | "spudding bit","浅钻钻头 ; 侧冲钻头" | "spudding boreholes","表土顿钻钻孔"

photoperiodic response：光周期响应

photoperiodic induction 光周期诱导 | photoperiodic response 光周期响应 | photoperiodism 光期性

Multi-Variate Statistical Analysis：多元统计剖析

311. 多项距阵 Multi-Nominal Matrix | 312. 多元统计剖析 Multi-Variate Statistical Analysis | 313. 发电厂 Power Plant