1. สาเหตุเกิดจากสภาพโครงสร้างอาคารม

One. Mainly due to the building structure with a hole in the ceiling inside the hatchery building. Which insects can enter the building and housing of insects
2.root causes of human error and the door does not close completely. And I left the door open
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1. why there are buildings, structures from the vagina hole on the ceiling inside the building at hatch, which can fly into buildings and homes of insects
2. Root Causes of Human Error and not close the door to employees leaving open doors like
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1. Cause of building structure condition is a point on the ceiling inside the holes in the building hatchery operations that make insects can come into the building and construction of insects
2.Root Causes Human Error of the employees at the door is not closed properly and left the door open like