depth standard

international standard depth

standard depth

standard depth level

standard depth scale

standard frost penetration

standard standard of vo|

controlling frost-depth

frost depth

95th standard project standard

adoption of international standard and advanced oversea standard

QUALITY STANDARD(OEKO-TEX STANDARD 100\ISO9002\SGS\ITS\AATCC\M&S)

shortened rail；standard shortened rail；fabricated short rail used on curves；standard curtailed rail

Standard addition method and internal standard method

Standard and non-standard TV systems

standard of aroma type and standard sample

First frost date and late frost date

first frost date and latest frost date

Girst frost date and late frost date