Scrape Html Table they will provide some empty result

Question

import scrapy
from scrapy.http import Request


class PushpaSpider(scrapy.Spider):
    name = 'pushpa'
    start_urls = ['http://smartcatalog.emo-milano.com/it/catalogo/elenco-alfabetico/400/A']

    def parse(self, response):
        for link in response.xpath("//div[@class='exbox-name']/a/@href"):
            yield response.follow(link.get(),callback=self.parse_book)

    def parse_book(self, response):
        rows = response.xpath('//table[@class="expo-table general-color"]//tr')
        table = {}
        for row in rows:
            key = row.xpath('.//td[1]//text()').get(default='').strip()
            value = row.xpath('.//td[2]/text() ').getall()
            value = ''.join(value).strip()
            table.update({key: value})

        yield table 

I am trying to scrape table but they will not give the information of Telefono,Fax,Email,Membro di,Social check these

{'Indirizzo': 'Dr.-Auner-Str. 21a', 'Città': 'Raaba / Graz', 'Nazionalità': 'Austria', 'Sito web': '', 'Stand': 'Pad. 5 B22 C27', 'Telefono': '', 'Fax': '', 'E-mail': '', 'Social': ''}

the link of page is http://smartcatalog.emo-milano.com/it/espositore/a-mannesmann-maschinenfabrik-gmbh