怎么测试功率管的好坏,功率管怎样判断它好坏

{"rich_content":{"text":"","spans":null},"video":{"vid":"v028b0c40000bu1r1mn1gn3i4b7sjh00","duration":92.532,"width":640,"height":360,"file_size":2449753,"thumb":{"web_uri":"tos-cn-p-0000/ea00eb04c12d49bcbbb0616c9bd9eb8a","width":640,"height":360,"image_type":null,"mimetype":null,"encrypt_web_uri":null,"secret_key":null,"encrypt_algorithm":null,"extra":null},"video_size":{"high":{"duration":92.532,"file_size":3628489,"w":640,"h":360},"normal":{"duration":92.532,"file_size":3628336,"w":640,"h":360}},"is_encrypted":null,"sp":null,"md5":"37c7317c6f640aa0a9441d9fba372b18","tos_key":null,"secret_key":null,"encrypt_algorithm":null,"extra":null}}