行业认证可用，但在曼尼·托巴省，阿尔伯塔省，育空地区，西北地区和努纳武特地区是自愿的。
Trade certification is available, but voluntary, in Manitoba, Alberta, the Yukon, the Northwest Territories and Nunavut.
行业认证可用，但在曼尼·托巴省，阿尔伯塔省，育空地区，西北地区和努纳武特地区是自愿的。
Trade certification is available, but voluntary, in Manitoba, Alberta, the Yukon, the Northwest Territories and Nunavut.
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