centre-jet drill bit

This is jet bit and that is a PDC bit.

这是喷射式钻头，那是人造聚晶金钢石钻头。

The research of supersonic multi-nozzle ejector reverse circulation bit

超音速多喷嘴引射器式反循环钻头研究

Study on the Bottom Hole Pressure Properties of the Oscillating Pulse Jet-Nozzled Bit

振荡脉冲射流喷嘴钻头井底压力特性研究

jet piercing burner

热力喷射钻孔燃烧器

jet-projecting machine, sand, steam, powder or liquid (excl. container cleaning machines, soot remover for boilers, and jet type dental drills)

砂、蒸气、粉末或液体喷射机（不包括容器清洗机器、锅炉除烟垢器及喷射式牙钻

hydraulic gun (liquid-jet-type)

水枪（液体喷射式）

Experiment and analysis of performance parameters for refraction nozzle in vent wash exhaust hood

运水烟罩内折射式喷头性能参数分析及试验

reverse spray sprinkler

倒向喷雾式洒水喷头

Ouantitatively Calculating Method of Rheological Parameters of Jet Drilling Mud

喷射钻井泥浆流变参数定量计算方法

When the bit goes through the BOP, slow down, please!

当钻头通过防喷器时，慢一点放。

Study on the Ejector and the Solar Ejector Refrigeration System;

喷射器与太阳能喷射式制冷系统研究

Study on the Gas-liquid Ejector and Bi-ejector Refrigeration System;

气—液喷射器及双喷射式制冷系统研究

airless injection engine

无气喷射式发动机，机械喷油式发动机

The Design of the Flooding Nozzle in One Kind of Irrigator and the Calculate of the Parameter about Aater Jet;

一种可回收式洗消装置喷头的设计思路和射流参数计算

three point neat-bit reamer

三点式近钻头扩眼器

rock-bit interaction model

岩石-钻头互作用模式

A jet - propelled vehicle, especially a jet - propelled aircraft.

喷射器喷气式机动装置，尤指喷气式飞机

external air (injection) manifold

外装式空气喷射总管