| 摘要 |
FIELD: transport, package. ^ SUBSTANCE: proposed method comprises one basic element to be secured on vessel hole and one swinging cover secured in basic element to swing between closed and open positions. Said basic element consists of two parts and comprises, in fact, one fastener accommodating dome-shaped outlet element with outlet hole inserted therein. Said outlet hole receives annular ledge made on said swinging cover. Annular fastener and swinging covers are made integral and in open state. Then swinging cover is changed into closed position and, thereafter, outlet element is fitted in said fastener. ^ EFFECT: perfected method. ^ 3 cl, 3 dwg |
