BATREL CLAUDE ANDRE FRANCOIS,BECKER CHRISTIAN GUY LOUIS
申请号：
FR19980003212
公开号：
FR2776063(A1)
申请日:
1998.03.11
申请国别(地区):
法国
年份:
1999
代理人:
摘要：
Two conducting tubes (1,2) are located at preset angles within a box and contain balls (3,4) which are free to move. The ends of the tubes are closed by insulating caps (5,6,7,8) which have conducting inserts (9,10,11,12) connected to indicating lamps (17,18,19,20). The lamps are supplied from a battery (16) through an on/off switch (22) and indicate any correction required to the slope
