案例分析：例如，在製造開關電源時，設備內部有一塊電路板。從外面看，只需開模具製作塑膠外殼即可實現防水防潮。外殼可選用緻密材料，連接處可採用防水橡膠圈密封。這可以有效阻擋灰塵、水和類似元素。然而，用熱熔膠密封外殼可能會導致以後的維護問�

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Enrollee agrees that every one workout routines and/or courses are carried out at student’s very own possibility. The enrollee understands the treatments and physical exercises involved with instruction and participation as spelled out to him/her by an assistant of the middle. The Enrollee understands that there is a danger of non-public harm ass

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