PCB设计的帮助性文件，主要侧重于PCB的布局中应该注意的问题，文件为PDF格式-PCB design help document, mainly stresses the question which
should pay attention in the PCB layout, the document is the PDF form
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002029s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.085226s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002190s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001901s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002092s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003621s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001996s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003128s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015033s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002377s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 317793 [ RunTime:0.001292s ]
