Bureau of Indian Standards
BIS isa statutory institution established under the Bureau of Indian Standards Act, 1986 o promote
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BIS has the copyright falls publications. No pat fat publication may be reproduced in any Som
‘withostthe pri penmssoninwago BIS. This doesnotprecadethe ews, Inhecaurseofimplenenting
he standard, o ecessary details, such as symbols and ie, pe or grade designations. Enquiries eating,
to copyright be addresse 1 Ihe Director (Pubetions), BIS
Amendments are issued 0 standards asthe nee ais ont basis of coments, Standards are aso reviewed
Periodically; standard alongwith amendes teaffiemed when such review indicate hat a changer are
este, ihereview indicas ha changer ae needed, ak up for revision Users o nian Standards
‘hod asceran that they are in potesson ofthe ae amendment or dition by refering the test ae
‘This indian Standard has been developed rom Doc No, MTD 194264).
Amendments Issued Since Publication
frond No. Date of have Tew Arte
BUREAU OF INDIAN STANDARDS
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