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In CSA standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard.- K. E' R- n; A9 c4 Z
0 ]2 T7 V6 _) p) A$ ?以上文字摘录自:CSA C22.2 No.250.13-12,如图:! b, O6 o/ V0 [8 f' @3 H3 Y6 O
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; C( d4 e# A) t0 ?, Y欢迎探讨标准细微之处!
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