AWWA standard for ball valves 6 in. through 48 in
American National Standards Institute., American Water Works Associationसाल:
1986
प्रकाशन:
American Water Works Association
भाषा:
english
पृष्ठ:
32
श्रृंखला:
AWWA C507
फ़ाइल:
PDF, 444 KB
IPFS:
,
english, 1986