Definition

Examples

• 工人们正在修建一个新的井筒。
  Gōngrénmen zhèngzài xiūjiàn yí gè xīn de jǐng tǒng.
  The workers are building a new shaft.
• 这个井筒有三百多米深。
  Zhège jǐng tǒng yǒu sān bǎi duō mǐ shēn.
  This shaft is over three hundred meters deep.
• 矿井的井筒需要定期检查。
  Kuàngjǐng de jǐng tǒng xūyào dìngqī jiǎnchá.
  The mine shaft needs regular inspection.