【拼音】：xué jǐng 【注音】：ㄒㄩㄝˊ ㄐㄧㄥˇ 【汉字】：穴井
通过工程实例，介绍了煤层气掏穴井施工的目的、技术要求、设备机具、施工工艺，以及掏穴作业和技术措施。
The paper detailed the technical specification, equipment, construction technology and technical measures of enlarging borehole in shaft for coalbed methane with field cases.
十宣穴是后世医家在长期医疗实践中对十二井穴的再发现，在位置上与位于指端正中的井穴重合。
The doctors of later generation rediscovered that the shi-xuan points' location was coincided with the well points' location in the medical practices.
现在对井穴定位中的“爪甲角”应当是指甲端之角；
Now the nail's corner on the Well points' location seemed be located at the upper corner of them.
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