Water Saving Irrigation 1979 Issue 2 wo guo pen guan ji shu de fa zhan

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Water Saving Irrigation
1007-4929
1979 Issue 2

wo guo pen guan ji shu de fa zhan

..............page:80

pen ju jian suo jiao yi 27 wei hao
ma xiao ge ;

..............page:80

quan guo pen guan beng xi lie jian jie
zuo shen kang ; xu jing fang ;

..............page:17-24

pen guan xi tong de zi dong hua
chen da diao ;

..............page:54-68

gan su shi zhi chu da xing shuang xuan bi pen guan ji

..............page:11

jie shu pen guan , xiao guo xian zhu
zhang yi li ;

..............page:46

he nan sheng jin xing su liao guan dao kuai su jie tou tian jian ce shi kao he

..............page:30

pen ju yu she cheng pen tou she ji li lun yan jiu zhi yi
chang wen hai ;

..............page:31-36

feng dui dan pen ju da pen tou shui liang fen bu tu de ying xiang
huo li si shu er ; a si dai la ; chen xue min ;

..............page:75-80

shang hai zhao kai pen guan xian zuo hui yi

..............page:3

pen guan xi tong guan li

..............page:6-11

gan 3c 3o xing pen guan ji tong guo sheng ji jian ding
shen xiao wei ;

..............page:41

zhu yi ti gao py₁ xi lie pen tou de zhu zao zhi liang

..............page:68

you you liang zhong pen guan xi lie beng tong guo jian ding
chen zu zhen ;

..............page:24

gan zhe pen guan guan gai zhi du de ji ge can shu

..............page:47-53

zhong yuan 50y xing pen tou shui li te xing de shi yan yan jiu

..............page:37-41

xiao mai de shi shi pen guan zhi biao
ding xi quan ; zhao hua chun ; xiao jun fang ;

..............page:42-46

ning xia kai zhan ping guo fang shuang pen guan shi yan
li zhi tian ;

..............page:16

pen guan shi dian he gui hua she ji ji shu tao lun hui ji yao

..............page:1-3

xi ou pen guan ji shu de fa zhan
hao jin dong ;

..............page:69-74

ji lin sheng ju ban pen guan xue xi ban
wang shun fu ;

..............page:87

yi dong shi pen guan xi tong ji shu jing ji zhi biao de ce ding

..............page:12-16

yao bi pen tou she ji li lun zuo tan hui zai zhen jiang zhao kai
chang wen hai ;

..............page:36

100 mi dian dong ping yi shi pen guan ji de shi yan yan jiu

..............page:25-30+2

pen guan kang yu xiao mai gan han feng

..............page:87

py₁ xi lie de xiao pen tou ji jiang tou ru shi zhi
li shi ying ;

..............page:41

xi cang cao yuan you liao pen guan ji
meng bo ;

..............page:53

liang zhong pen guan fang fa dui cheng ling zuo li yuan xiao qi hou de ding liang xiao ying
j. luo mai si ;m. man de er ;

..............page:81-87

tan tan pen guan ji ju de xuan xing wen ti
zhang guang fu ;

..............page:4-5

nan yang she fa ti gao pen guan ji ju zhi zao zhi liang
ma qi xiang ;

..............page:53

mei guo de di guan xian kuang

..............page:68

pen guan tian jian shi yan ke ti hui yi zai hang zhou zhao kai
wu jin sheng ;

..............page:36

an hui sheng ju ban pen guan xue xi ban

..............page:3

shang hai jian ding gai xing ju bing xi su liao guan dao
lu ai cheng ;

..............page:11