Low-pressure liquid containing reservoir, has cylindrical spacer with structure forming incipient crack zone at level of central part of other spacers, where central part of former spacer has diameter less than that of spacers

摘要

The reservoir has spacers (5, 6) provided as internal walls and extending vertically to connect upper and lower walls (1, 2). A cylindrical spacer has a structure forming an incipient crack zone distant from junction zones and situated at the level of a central part of the spacers (5, 6). The central part of the cylindrical spacer has a diameter less than that of the spacers (5, 6) and reduced thickness.