free pipe meaning in English

未胶结套管

In addition , free pipe organ recitals are held at the concert hall on selected saturday afternoons . hong kong cultural centre arts and crafts fair - performance programmes are also held at piazza area c on selected sunday ( & public holiday ) afternoons
为推广中国传统艺术及发扬中华文化的姿采，本中心在每月首个周四周六，特别编排富中国特色的大堂免费节目，万勿错过！