BEIJING, Aug 30 (Reuters) - Growth in China"s factory activity likely cooled further in August, a Reuters poll showed on Monday, as COVID-related restrictions and high raw material prices continued to pressure manufacturers and the economy lost momentum. The official manufacturing Purchasing Manager"s Index (PMI) is expected to slip to 50.2 in August from 50.4 in July, a fifth month of slowing growth, according to the median forecast of 33 economists polled by Reuters. A reading above 50 indicates expansion from the previous month. PMIs for manufacturing and services will likely moderate in August due to COVID-19 outbreaks of the more infectious Delta variant and ensuing lockdown measures, said analysts at Barclays in a note. "With slowing growth momentum and dovish signals (from China"s central bank) we expect more easing, but still at a measured pace as policymakers eye headwinds in 2022." The world"s second-largest economy staged an impressive recovery from a coronavirus-battered slump, but growth has recently shown signs of losing steam due to domestic COVID-19 outbreaks, slowing exports, tighter measures to tame hot property prices and a campaign to reduce carbon emissions. To bolster the economy, the People"s Bank of China (PBOC) in mid-July cut the amount of cash banks must hold as reserves, releasing around 1 trillion yuan ($6.47 trillion) in long-term liquidity. Many analysts expect another cut later in the year. China"s latest coronavirus outbreaks appear to have been largely brought under control, with zero locally transmitted cases reported on Aug 29., for the second day in a row. read more But it spurred authorities across the country to impose counter-epidemic measures including mass testing for millions of people as well as travel restrictions of varying degrees and port shutdowns. Meishan terminal at China"s Ningbo port resumed operations in late August after shutting down for two weeks due to a COVID-19 case. The closure caused logjams at ports across the country"s coastal regions and further strained global supply chains amid a resurgence of consumer spending and a shortage of container vessels. read more Higher raw material prices, especially of metals and semiconductors, have also pressured profits. Earnings at China"s industrial firms in July slowed for the fifth straight month. read more The official PMI, which largely focuses on big and state-owned firms, and its sister survey on the services sector, will both be released on Tuesday. The private Caixin manufacturing PMI will be published on Wednesday. Analysts expect the headline reading will slip to 50.2 from July"s 50.3. ($1 = 0.1546 yuan)