6.2 the date stamped by the air transportation ageney at_________，shll be takenas the actual date of delivery paryt a shall send to party b a photostat copy of theairconsignment note shwing the stampde date of arrival.
6.3 within twenty-four hours after the despatch of each lot of the technical documente，party b shal1 notify party a by cable or telex of the contract number， number and dateof the air consignment note， items of the documents， number of pieces， airmail toparty a two copies of each of the air consignment note and detaikled list of thetechnical documents.
6.4 if the technical documents are foumd lost， damaged or mutilated during airtrans-portation， party b shall supply party a free of charge with a second lot ofdocuments within thechortest possible time but not later than thirty days after it hasreceived from party a the writtennotice. within sixty days after party a has receivedthe documents from party b，if party a does not declare the shortage and request tocover the same， it is considered asa-cepted.
6.5 the technical documents shall be in english and based on metric system ofmeasure-ments.article 7 verification and acceptance
7.1 the verification test on the first samplemachine of the contracted&nbs p;product shallbe carried out by the joint group consisting of party as and party bs representativesaccordingto the schedule and contents stipulated in appendix 7 to the contract. lf theperformance of the contracted product is in conformity with the technical specificationsstipulated in ap-pendix 1， such testshall be considersd as qualified and therepresentatives of both parties shll sign the inspection and testing certificate for theproper performance of the contracted product in quadruplicate， 2copies for each party.
7.2 if the verification test demonstrates that the performance of the contractedprod-uct isnot in conformity with prescribed technical specifications， both partiesshall， throughamicable negotiations，make a joint study of and analyse the cause andtake measures to e-liminate the defects and carry out asecond test. when the second testdemonstuates tha the performance is qualified， both parties shall sign a testingcertificate for the proper perfot- mance
7.3 if party b is responsible for the failure of the first test， party b shall sendat ist own expense technical ersonnel for the second test.
7.4 if the second test fails again and the failure is attributed to party b， party bshallindemnify party a for any losses sustained and shall take effective measures toeliminate thedefects and carry out a third test.