.Everyone must do BE.(น้ำหมักชีวภาพ) by 5 students per small gr.(you can have friend from difference gr. if you want) by call to make appoint ment to me 30 minutes before but must do it within Feb 14 18:00 if not 1 hr. before I let you do it and you must release gass when it full of gass too. I may have vegetable then who come first no need to bring vegetable then ask me before.