如果在密闭空间使用溶剂，请确保工作区域有良好的空气流通。
A.If you use solvent in a closed space, make sure that there is good airflow in the work area. B.When using composite in confined space, make sure it has good ventilation. C.You can not use sealant in enclosed space on condition that there is no good ventilation.正确答案A
