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International bowling is regular
From;    Author:Stand originally
1, completely medium: Drop a ball when the first time of each case knockdown and all when 10 erect bottle, become completely medium. With (X) symbol record is in on billiard-marker watch in the small pane of left of this division upper part. Completely medium billiard-marker is add this athlete 10 minutes below two times to join the bottle number with knockdown ball. The highest cent of one bureau 300 minutes, athlete must pitching 12 completely medium.

2, in filling: Drop a ball when the 2nd knockdown this case the first ball the rest of all bottle, call in filling, with (/ ) express. The record is inside the small pane of this case top right corner. The billiard-marker in filling is add athlete the next 10 minutes the bottle number with knockdown ball.

3, error: Outside bottle of part of the body after dropping a ball except first time, ball hind is cast twice in some case when the athlete, fail 10 bottle all and knockdown, it is error namely.

4, cent bottle: Dividing bottle is to point to after pitching of the first ball, etc of a bottle a few bottle are knockdown, the bottle that leave submits following 肰 form:

1)2 or the bottle of 2 above, there is a bottle at least between them by knockdown when. Be like: 3 7 bottle and 9 bottle, bottle and 10 bottle.

2)2 or the bottle of 2 above, endure the bottle in front of them closely to have 1 at least by knockdown when. Be like: 5 bottle and 6 bottle.

Note: Cent bottle is used on billiard-marker watch (O) expresses.

5, foul: When dropping a ball or after dropping a ball, partial body of the athlete touchs or surmounted foul line, and when any parts that contacted lane and its equipment are built, it is namely foul. Till the effectiveness for a given period of time that fouls this drops a ball till this athlete or an athlete. Foul use on billiard-marker watch (F) expresses.

6, bottle of lawful and knockdown ball

The athlete sends the following case of bottle of the ball after the ball legally, will be considered as bottle of lawful and knockdown ball:

1, by ball and other bottle direct and knockdown or the bottle that attacks a platform that put bottle.

2, by from clapboard of two side wall or lane hind dead block rebounds the bottle place that come back knockdown or the bottle that attacks a platform that put bottle, all regard knockdown bottle as computation.

3, be swept before sweeping ball bottle bottle implement rail rebounds the bottle place that come back knockdown or the bottle that attacks a platform that put bottle.

4, inclined the bottle that leans on side wall clapboard.

Before dropping a ball the next time, these bottle should keep clear of.

7, bottle of illegimate knockdown ball

Every belongs to the person that leave a case, the ball that drops a ball is effective, but be not granted by knockdown bottle billiard-marker:
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