1.
diameter and number of hole
喷嘴量孔孔径及数目
2.
square-edged orifice
直角铣孔流量计孔板
3.
Research on Quality of Drilled Holes for Cast-in-Place Piles in Shanghai District;
上海地区钻孔灌注桩成孔质量的研究
4.
Small amount of a drug that is sniffed
（用鼻孔吸入的）少量毒品
5.
borehole content analyzer
钻孔矿物含量分析仪
6.
orifice well tester
孔板式天然气流量计
7.
digital display measuring instrument for motor mounting hole
电机底脚孔数显测量仪
8.
bellows-type gas or orifice meter
伸缩式气体孔板流量计
9.
Rising temperature of casting solution will increase the water flux, porosity and average pore size of PVDF membrane.
制膜液温度升高，得到微孔膜的孔隙率、通量及平均孔径都增大。
10.
Instantaneous Clearance of Ordinary Punching and Precise Punching Without Burr and Its Influence on Punching Quality
普通冲孔与无飞边精密冲孔的瞬时间隙及对冲孔质量的影响
11.
Post pressure grouting of borehole cast-in-situ pile bottom and its quality control
钻孔灌注桩孔底后压浆施工工艺及质量控制
12.
Study on Slender Hole Ultra-precision Measuring System and Precision Analysis;
细长小孔孔径精密测量系统的设计及精度分析
13.
Quality Questions Study of Diesel Engine Cylinder Block Bore and Cylinder Bore Machining;
柴油机机体缸孔及缸套孔加工质量问题探讨
14.
Research on high-precision capacitive automatic measuring system for pinhole diameter
高精度电容式小孔孔径自动测量系统的研究
15.
Pile-forming Construction Quality Control of Bored Pile of Highway Brige
公路桥梁钻孔灌注桩成孔施工的质量控制
16.
On the quality problems in drilling
浅谈如何防治钻孔灌注桩钻孔施工时质量通病
17.
cumulative injection in pore volumes
以孔隙体积计量的累计注入量
18.
STUDY ON MEASUREMENT METHOD OF SMALL ORIFICE CONDUCTANCE USING GAS MICRO-FLOWMETER
气体微流量计测量小孔流导方法研究