矿工定位系统,包括单片机原理图,PCB,KEILC51原代码,带瓦斯检测功能,成熟产品正在使用中-Miners positioning systems, including single-chip schematic, PCB, KEILC51 the original code, with gas detection, mature product is in use
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001516s ]
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:0.069971s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000972s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001209s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000918s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003103s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000803s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003796s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015290s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.000996s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 122251 [ RunTime:0.014101s ]