| 摘要 |
PROBLEM TO BE SOLVED: To provide a test with extremely small possibility of scattering soot and smoke, odor, gas-shaped or misty generation substance, dust, or fine particles to the surrounding environment while forming a nearly closed working space. SOLUTION: The tent roof unit and the tent are provided with an exhaust duct connection part for sucking and unloading soot and smoke, odor, a gas- shaped or misty generation substance, dust, or fine particles being generated by work being made in inner space from the inner space to the outside along with air. The method for using the tent comprises connecting the exhaust duct to the exhaust duct connection part, and reducing pressure and performing sucking through the exhaust duct, thus unloading the air inside the tent to the outside along with a different substance contained in air.
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